Nice and nice game. I would only recommend making the control still on "WASD".
Viewing post in Snowball's Platforming Adventure jam comments
If I started working on the game earlier, I would've had more time and implemented what you've mentioned along with other features (like overriding the Shift keys to make the player run instead of jump, volume control, leaderboard, etc.). Unfortunately, I was occupied with other things within the several days since the jam started, so this is what I came up with. 😿