*Here's a hint for those struggling with the controls.*
The game AUTOMATICALLY turns you around when you jump during, or at the end of, your dash. Meaning, if you're trying to use the arrow keys to manually do this, you're overcomplicating how this works. Just 2 buttons, Jump / Dash / Jump / Dash and you can rise to the heavens! Once you realize the game does this hard part for you, it gets substantially less frustrating.
Also keep in mind, after you strike an enemy your jump and dash reset. As long as there are enemies around you can reach, you could go on forever.
I like how the game controls are a unique mechanic and as you progress through the levels, the game introduces just 1 or 2 new ways to ways to utilize your combo in scaling difficulty. This is really great-design practice to how to keep players immersed in your game, without getting too bored because of repetition.
I couldn't get to a menu through ESC or ENTER or any other key without resetting. Maybe there's a way, but it's not obvious, and it's not the standard. I think you should be able to have a pause based menu for any game, particularly casual games. Also, "R" didn't reset, which doesn't hurt your star rating, just a suggestion in a game where there aren't any way to restore your HP until you reach a boss room. There's a couple levels where one of the starting mechanics was a bit tricky and would cost me a health point, and I want to go ahead and reset, but had to reload the entire webpage, instead of just doing it in a menu or hotkey.
There are a couple places where you're blindly dropping into unknown areas into certain death. *snails* Which the game actually sits there on the screen for just the perfect amount of time to rethink your life choices, BUT your body is gone, so you don't get a good feel for exactly how much timing you need to tweak or how much further or less you need to jump.
So, if you were build more on this current game, I think you use your current first level and go higher. For example, when you do the first level, there is currently a ceiling. Maybe after beating the final normal level, that ceiling is unlocked and there's access to a new world from there. You could put a hint on the final normal level that they should check out the first level and try for new heights, or something.
Great game, right in time for pixel day. And as pixel day passes, maybe see if you can build more on this concept. It just needs a couple more levels and a some minor interface tweaks to be 5 star for me. Keep it up!