Good concept but the execution was poor. I know you made the game in only 3 days and not the 7 day time limit so let me give you some advice if you're planning on updating the game in the future.
The player will sometimes get stuck on walls and objects and will sometimes mess my jumps up, luckily the way to fix this is quite simple. Just apply a physics material 2D to the players rigidbody with 0 friction.
A visual representation of how high my character will jump would help me understand how far I could leap and improve the overall experience. Maybe make the player sprite look more tired the more you jump.
Adding checkpoints would also help alot as dying to a single spike would send me all the way back to the start. Maybe make the fountains also act as checkpoints.
The one way doors could use a visual indicator, like an arrow, to show where you can enter them through.
With those improvements I could definetely see this game becoming something great in the future!