It felt like an FPS with crafting. Well done. I liked the music, and the gameplay was solid. The enemies did a lot of damage, but were easy enough to dodge one-one-one. When they wandered into range of others, they got touch to dodge.
The game itself was very laggy. This happened whenever I activated something. This could be not caching particles, not using preload() on resources like sounds or graphics and instead using load(). Once I had died, things got better. I got tired of having to start over when I died though. It would have been nice to have a full screen option.
Really well done for a game jam. Impressive amount of stuff accomplished!