Very well done on the jump+dash mechanic. Good way to put multiple things into one action! The game had just the right amount of difficulty and didn't overstay it's welcome. Some portions had minor flaws like bashing your head on the ceiling at the long jump location (jump + jump sign), and the lava sliding section being a bit too zoomed in.
Also I went through the caves but after replaying the game for a bit to listen to the audio design I noticed you can just skip that whole portion right at the start? 😂
I loved the intro illustrations, that poor kitty being flung out of the car though! The tileset could use a bit more work, but that's a craft in itself and you can only detail so much during a week. The slippery block doesn't tile properly which you get used to at some point, but it was a bit of a shame given how much it was used. The player's animations are great as well. I just noticed there's a crouch animation for some reason, interesting :D
The music is nice and relaxing. I loved the cave ambience with the dripping sounds.
Overall well done on the whole game! It has a lot in a small package.