This music really goes hard. Also this game got some nice graphics and effects, and killing enemies after assembling the machine is satisfying.
However, I had a problem with my first playthrough because energy gauge doesn't seem to fill up after using it all. I found that energy cores exist in third playthrough, because I just assembled the machine near spawning position in 1st and 2nd. Since the machine destroys the signpost, I skipped the important information and had trouble with later levels. I think objects that contain vital information shouldn't be broken easily.
Still, I had a fun time after getting hang of it. Nice job :)