Has a lot of potential! The movement and shooting feel good. Maybe add a few more maps, or more enemy types. Some music would also help. And add a game thumbnail! 

Bro you lost lots of ratings simply for not adding a thumbnail to an otherwise beautiful game :( 

No way its your first game! Looks really good. One of the good ones in the jam. Keep it up. Also, check out my game if you feel like playing.

pretty fun, it would be pretty cool if the map was a bit bigger though!

cool! Perhaps could make the weapon rechargeable and put ammo in challenged spots

Nice game! Pretty great for a first game :)

Nice game! I like the impact of weapon shaking the screen, but I can't find the theme :(

niiiiiiiiiiiice

Cool! :D