So, I played the game a couple of times (before I made my account), and it's cute...
Sound effects: Not extraordinary, but very okay! However, auch, the player death sound is so loud it makes my ears bleed!
(May we have an option to not have the screen flash on player death?)
Background music: I came back to the game for the music...
(Can there be more? This track is really nice, I like it! However, imagine after 100 hours of play...)
Game Feeling: I like how the platforms are very forgiving and the character can climb its way up a platform. I just like forgiving games.
The jumper platforms, however, launch you in a situation for which you might not be prepared, and also might launch you to a space where there are no platforms in range to fall on. I think it's very unforgiving and not fair; it feels like death to RNG. I'm okay with dieing because I hesitated in mid-jump, or misjudged my range, or to poor mid-air control on my end. But not to RNG. (I'll suggest a double jump later.)
Please, don't add platforms that will immediately disappear after the first player jump, particularly acceleration platform. New players (myself) will die, to the game baiting them to jump on the accelerators.
Ideas: Emergency jump, obviously. A second jump with the up arrow, that would require several seconds to recharge (seconds are a long time in this game), or every time an accelrator platform is used.
Moving platforms could be more rewarding: higher jump height based on the size and speed of the platform?
Procedural RNG. Done by reseeding the RNG at start of the run.