Puzzle Game : Eat or be eaten

This is the first game I publish, it's a small puzzle game which I'll upgrade with time. I'll would like to have some suggestions for improvement so feel free to comment !

You have to eat all the spheres on the grid but if one eat you it's lost. You can move on the grid with two different spells, one moves you for 1 cell and cost you 1 HP and the other for 2 cells but costs you 5 HP. Each time you eat a sphere you gain +1 HP.

The "enemies" moves for 1 cell towards you when you move.

If you kill an enemy you push all other enemies next to you.