Pretty neat game! Fun, flashy, fast and challenging gameplay: all-around seems well put-together. Loved the little touches like the way the power-ups swoosh up to the bar (as it both looks cool and subtly lets you know what the power-ups do) and the randomly varied noises for jumps and such (to avoid audio fatigue).
If I were to have any complaints, it would be:
*Game dedicates way too many levels at the start with boring layouts where springs and spikes were the only new obstacles. It was only once like 10 levels went by where the pace picked up and started introducing tons of new stuff at a rapid pace: moving platforms, lava races, sawblades, guns, etc. I would slightly push more of those new obstacles back to the early levels to keep the player hooked as I could see some people dropping off due to early boredom.
*The noise for movement should probably only happen when doing major movement: was silly to hear a big WHOOSH sound when I'm just tapping the character to adjust myself a centimeter.
*Didn't like how some of the obstacles were these off-screen traps that you only know how to dodge once you've died to them before: feels unfair and annoying.
*Springs result in your gravity distorting in a weird way where you float down too slowly.
*Was curious on whether the energy bar should just deplete over time instead of only on movement to push the player to move fast and not wait around. Maybe having it the way you do is best though, where you can have some people focus on just beating the level while others race for records. I think the game works best when you force them to race though, and in fact I think you should die if you run out of energy instead of just...nothing happening? But that's me.
*I also think it's too forgiving with checkpoints, as I think the levels are short enough where checkpoints aren't needed at all. Basically I want this game to be fun and challenging, but right now it's so forgiving with you not dying on energy loss, not losing energy by standing around, and having checkpoints everywhere, that it's too easy to just not be stylish and fast at all. Why bother trying when there is no punishment?
*Didn't like how you had controller input, but for some reason force the controllers to use a virtual mouse cursor.
*Bit confused on the ranking system: felt like I just got random congratulatory messages no matter what I did: good or bad. I'd like to get more fanfare if I do well have them catalogued so I can go back and redo levels I didn't do well.
Anyway, I know that's a lot of negative feedback, but it's still a solid game. Well done!