A bit too generic, and you got a problem with sprite scaling, the level design is not the best, at some jumps i can't see where i'm going to land and just hope that there will be a platform and not an enemy.
I don't think the limitation is too clear because a finite quantity of collectables and finit quantity of heald are mechanics all generic platformers have.
Some tips:
- When scaling sprites don't use the scale from the transform, just scale the sprite itself.
- When designing a level, make sure the player can see where he is going, if he has to go down make sure he sees the platform where he is going to land, and if you want him to just jump and know it's not a mistake you should add some indication for example a diamond where he is suposed to land or a sign that tells you the way.
- When you hit an enemy in your game the you don't even notice, when there is an interaction with something in the world you have to make the player feel he is interacting, if he gets hit add a sound effect or a visual effect that shows that's happening, it will be much better.
Hope this helps you to improve your games, keep working hard and you'll get better results!