Cute little game! I love the pixel art, and the vibe is really fun.
It needs settings, especially for volume control, (web games are super loud on my computer for some reason so not being able to adjust that is pretty annoying for me)
I died like 6 times trying to figure out the jump button. Enter seems like a weird choice to me, but mostly the fact that it never tells you is the problem. Maybe making that pop up for a second upon starting a new game, or when you approach the first ledge, or even on the start menu would be nice.
The screen seems a little too zoomed in to me, as it's very difficult to see what's coming up, but that could be the point I suppose as that shifts the difficulty more towards reaction time and less from timing, so I guess that's up to what you want it to be. For me personally though it felt too zoomed in.
Overall, very cute graphics, very fun music and overall vibe. A good little game.