Really awesome! The overall story being on the environment was a cool touch. Not to mention the story aspect made me want to play completely through it. Most jam games have an appeal for playing thorugh only about 5 mins, but yours kept me invested due to the good progression and fun gameplay loop.
If I had to critique anything, I'd just say it would be nice to have him face which way he shoots and multiple sounds for shooting, but it's understandable with the limited time, and especially because you dropped that to put in more enemies and content, which was much worth it!
Great job!