Aw yeah, it's Gappy time! What can I say: the game looks good, feels good, is good, and is a huge improvement on the previous setup which you wouldn't think possible since it was already good, so great work on this! Just moving the character around is a delight, so I'm sure Shiggy would be proud.
But you know it and I know it, so let's not waste time flattering you. I'm here to be the fly in the ointment, the monkey in the wrench, the pain in the ass, and give you annoying nitpicky feedback that could hopefully improve the game even further:
*I was really surprised that the game has no coyote time in it! I know that some developers are against coddling the player, and sometimes they can be too generous with coyote time to the point that it leads to exploits, but I just had so many times I swear I jumped from right before the edge and ended up using my double jump instead of regular jump.
*Game has a real issue with jumping when next to walls. In fact, if you run up against a wall on the ground, you'll start glitching out like crazy once you make contact, and then if you try to jump when moving towards the wall, you'll immediately cling and kill your upwards momentum. Makes jumping up stairs really frustrating since you need to be sure to back up and give clearance before you jump! Probably need to change it so that wall-clinging only happens when you're moving downwards.
*The tutorial for the jump room is waaaaay too wordy with how it tries to explain everything at once, instead of pacing it out over several boxes. It should be more like the other room that only teaches you to butt slam once you get to the point you need it instead of cramming it into one single box at the start. The tutorial in Pizza Tower is a good example of this.
*I'm shocked that the game defaults to alternate controls which has run on circle instead of square. Who the heck puts run on circle?
*It's kinda weird that the title on the main menu goes slightly out of frame at the top. The text is also slightly off-center to the right, I think. Should probably adjust it a bit.
*I wanna promote this game, but you don't have good gifs on the Steam page! I can't sell people on the great movement with static screenshots! Get some gifs on there and I'll get to posting them around pronto to all the channels I frequent! And get the demo up there too (when it works with the algorithm of course!)