Good job on the sprites and details! Like the transition, helicopter, the wasd control, and the death "glitch". Well done!
There are couple problems though:
1. The turning doesn't feel right. Right now it is moving horizontally.
2. Player seems floating in the air.
3. The UI haven't cover the edge of the screen. I can see trees floating on the edge.
4. Sometimes, the enemy can be behind you.