I think this is impressive for a week's work. There is a lot of strong basis, and a little polish could really make it shine. I personally found that the jump was not as powerful as I would like it to be, especially considering the size of the level. I also think that the crystals were a bit too fast, or maybe just need some audio element to let the player know they are near bc it can be difficult to be looking out for them when platforming.
Overall, good job!