The game looks really good! I love the art and the sounds are fitting very well.
But the game itself is too easy. If you spawn projectiles in both directions you rarelly see an enemy. Only cause of the sound effects I realized - that I'm killing them the whole time without seeing.
Btw there seems to be a save-spot. I walked right and I guess I'm behind the enemy spawner. Actually I wanted to die to see the end screen ... but I don't receive any damage there ^^. So while I'm writting this I'm still ingame with full lp. But now I can see the enemies (they also look really nice!! So really great work with the arts!)
Besides that: I really like how you implemented the respawn-mechanism. It is really good that the player is spawned above the battle ground so that he has time to realize what has happened. This is really clever.