Decent gameplay, get's boring quickly though.

it has potential, it has a very basic "arcade" type feel, though it needs a lot of polish, the leveling up seems bland, and the combat is over simplified due to the ai being complete idiots. i do like the destructible environment, but the variety of what it offered was limited

i suggest different attack methods, more upgrades, and better ai. also some kind of progression besides "you get 5% more attack*

as for one death undoing all your progression, that is a very arcade-y style and if that was what your going for that is good, but if you wanted something more balanced, you may want a save function and better enemies

turrets, lazers, flying enemies *that can go over terrain* upgrades that let you do the same, that would be awesome.

for now its a very basic game nothing bad but it nees a lot of polish

Mediocre graphics, mediocre sounds, the gameplay does not take much skill or tactics.