Radial Flow

Open Hexagon is a game catered towards the most hardcore of Super Hexagon enthusiasts, with its Steam achievements demanding the most refined of both reaction time and muscle memory, and not many are able to say they completed every achievement there is. Now, what would happen if you took the difficulty curve of Open Hexagon, mapped it to the exponential function, and on top of that, involve learning an entirely new control scheme? That, my friend, is Radial Flow. This game may look like another clone of Super Hexagon, but the kicker is that the game is played exclusively with analog controls (aka instead of controlling with binary inputs like your keyboard, you move your mouse left and right at variable speeds). The mouse buttons do serve a purpose in this game, but it's not the same as you might see in Super/Open Hexagon; it reverses the direction in which you move your cursor.
You start off with very easy levels to help you get started to the concept of mouse control, but soon you will be challenged with four other difficulty sets. There are five of these sets (Easy, Medium, Hard, Extreme and Overflow), with each new set spiking up the difficulty ceiling by a metric f++kton. It brutally forces you to learn and master the mechanics even further, and just when you think you have it down, the next jump in difficulty makes you feel like you've been sent right back to square one. Not to mention, each set has two levels where you control TWO ships at once, each controlled by the X and Y movements of the mouse that dodge their own same-color obstacles. Yeah, it gets complicated.
The game also has its fair share of drawbacks. For one, a lack of more detailed audio options (it's literally just volume, no separate sfx or music options) as well as no video options (windowed/fullscreen, or even vsync for that matter). Second, a lack of accessibility options or ways to practice levels: personally, given the difficulty this game can reach, I'd suggest having there be some kind of invincibility mode that doesn't save your score, give achievements, or allow you to progress. Lastly, the difficulty balancing: I didn't mention this before, but in order to beat a level, you have to survive for 100 seconds flat, no exceptions. At first, it seems like a joke for the lower difficulties, but once you start going up higher than that, the realization of how crazy that time requirement is hits you like a truck. Even on Extreme and Overflow, you barely have time to breathe, and just when you think you think you get close to your personal best after dying, it turns out you weren't even close. Each level specializes a specific skill to be mastered, usually between reading, reflex, speed, and precision, so in that aspect, it's fairly balanced towards each type of incoming skillset. Overall, I think having additional difficulty sets to smoothen out the difficulty curve would be a splendid addition.
So with all things said, if you think that you will be getting a casual and enjoyable experience, TURN BACK NOW, because this is not the game for you. But, if you are a total reflex game junkie with a steady heart, hand and head; grab your biggest mousepad and buckle up, because you may just have what it takes to complete everything the game has to offer.

A very unique Super Hexagon inspired game that lets you play with mouse only, controls are smooth like butter (it can be a bit rough controlling it but it'll take time to master), includes 8 dual ship levels (in all difficulty) as well to spice up the challenge, a good way to confuse your brain, as such the game difficulty felt similar to Open Hexagon, this game is NOT for the faint of heart so get ready for it. This game also has a feature where hitting the wall kills you like the original hexagon game, watch out for that.
CAUTION
While it's a mouse only game, i recommend playing the game with a large mouse pad (it's really necessary), playing with an average mouse pad would make it more of a struggles.
Large mouse pad is needed if you're eager to complete the rest of the challenges in the game.
Now for the overflow difficulty and some settings that were missing from the game..
1. All of the levels in there looks.. something else, especially some extreme levels, they need more playtesting. After playing all of the levels by myself, most of the levels are imbalance, the developer should consider toning down the difficulty a little.
2. The game lacks a lot of settings like fullscreen/window, Vsync and many others, i hope this will get added in the future update too.

You've heard of Super Hexagon, the game famous for being one of the best and most polished reflex games on the market that still stays strong despite being aged. The game's difficulty arises from having to read patterns and quickly adjust on the go, while having to simultaneously combat any distractions the game throws at you.
Now, imagine Super Hexagon, but patterns rather than being grid-locked, are instead completely seamless walls, and control scheme rather than being binary left-right inputs are now analog, based on mouse movement. That is basically Radial Flow, and oh man, this game is HARD as FUCK
The difficulty doesn't come just from reads this time - now the movement is another skill that requires an insurmountable amount of precision and speed to complete the hardest of levels. You are no longer safe ever - hitting a wall from any angle, even from the side, will instantly end your run. Likewise, the developer went overboard with the difficulty, requiring the player to survive 100s STRAIGHT on a level to mark it as completed. While at first it's not so much of a challenge, later levels prove to be extremely troublesome. One and a half minute long gauntlets that require pinpoint precision and absolute focus with no time to catch your breath ever.
You see where I'm going with this, right? It's a game that looks at the currently existing Super Hexagon formula, yet adds an interesting spin to it that ultimately emerges completely different gameplay, which also requires mastery over completely different areas. Not to say there's no overlap though. But in itself, it's a game you can't enter expecting to crush it no matter your skill in other reflex games.
I have completed Super Hexagon and even got some scores that (used to) be top 100, and even am one of the better players in Open Hexagon, which is basically an amplified version of the former. Yet, now having sunk my teeth pretty deep into this game, all I can say is that this game feels like a completely different type of difficulty - not to say that the Hexagon experience doesn't help me, but it's not enough to carry me through. Hell it doesn't even feel like it contributes more than 10% of my overall success. And that is due to the game's absurd difficulty and level design which stress tests your control, endurance and reflexes, all at once, in runs that average a minute in length.
The patterns are not actually patterns, they follow rough generation rules, but they always have some variation to them, which makes runs extremely dynamic and truly never the same. Every time you are challenged from different angles, either requiring better reflexes, flicks or reads. But with the winning runs having to surpass 100s of straight survival, the game basically will force you to step out of your comfort zone; and if you don't survive the assault, you will have to start from zero. And again and again, until you win, or atleast set a new personal best.
Really fucking good game. Probably one of the best reflex games out there, and probably one of the hardest, too. Really replayable thanks to each level being completely unique, dual ship mode, and even the ability to import your own mp3s to customize your experience. For the asking price, it's a steal.
But if you do decide to try it, and commit for the 100%... then good luck, because that is an experience.

Spiritual successor to super hexagon but with your mouse, flows extremely well and controls are tight.

Underrated Super Hexagon Style Game!
Mr Developer, I just want to say I appreciate you. This game honestly really impressed me and I'm still discovering more. I just beat Super Hexagon today and my brother gifted me this game (and I already gifted it right back), at first I thought "oh cool gimmick but is there more?", but as it progressed I was hooked with the varying levels and difficulty. I discovered the game was not just mouse controlled SH. The duality mode isn't as interesting for me but the standard modes are vast enough. Absolutely worth it. We need more developers like you who breathe life into old concepts and even add their own great ideas, (In this case controlling with the mouse and balancing the game around it, instead of keys like in hexagon games). Good work and if you ever make anything similar I'll be a customer.

Fun game, highly recommend setting up your own playlist - helps get the vibe just right.

this game really challenged me, couldn't even do easy mode. will strive to get better. good game, recommend it if you like a challenge.