First of all. Dude. the music... absolutely FANTASTIC. I looovvee the mix of 8 bit and traditional instruments! It just perfectly nails the adventure vibes. Sound design is also really well done and the graphics are charming and smooth!
In essence, this was a great game for a 3 day jam. However, if you were to do more with this to expand it, there's a couple things I'd suggest. First off, while the game is great for short bursts, over a few minutes, it begins to lack incentive for the player to keep playing. If you were to add onto this, I'd either add some kind of objective (specific upgrades? a quest?), or make the map bigger for more visual variety and exploration.
Also, while the teleport mechanism is REALLY clever and fun to use, it feels a little OP right now. There's nothing stopping the player from using it over and over instead of focusing on wall jump. To balance this, consider throwing in a cooldown or a charge up... something that forces the player to only use it occasionally.
Wonderful job with this game! Keep up the good work!
-Sasha