Good level design and mostly well done mechanics! The graphics were from elsewhere but they were good.
Some critical feedback:
-The view was all over the place - sometimes too close to the player, sometimes the player was too close to the edge of the screen and it twitched around constantly. Fixing this would already improve the game a lot.
-No sound sadly, just some music and a shooting sound effect would have had a big impact.
-Somewhat unclear environment and enemies - the breakable objects didn't look like they could be destroyed, some background objects looked like they were solid ones and the enemies didn't look like they were taking damage when shot. The save points are very unclear too, had to read other comments to realize there was a saving function.
I encountered three big robots, I was able to stop them but not destroy. After them there were some blocks, I was only able to destroy some of them so that's where my run ended. The design is so good I want to like this but the view makes this a chore to play, sadly.