Stomp it

Hey my name is Anindra Das BIvas a.k.a Xneco. This is my first game made on my own using unity. All the sprite, artwork, music are made by me. If you played the game please give feedback on what i should improve, as this is my first project i know it is not that good. So i will try to take your feedback as much as possible and implement it on my next project. 
The basic premise of the game is stomping on enemies and killing them. I was inspired by the stomping mechanics of mario so i wanted to implement that on my own game.

CONTROLS:

A or D or ARROW KEYS TO MOVE LEFT or RIGHT
SPACE TO JUMP

KILL ALL ENEMIES AND COLLECT ALL GEMS TO GO TO NEXT LEVEL