Love the art style and models. I really like the twin-stick-shooter style with 3d models. However- I found the gameplay a bit frustrating. I didn't feel solidly "in" the world if that makes sense. I think it was due to there being no collision with generators.
Also, the music on the first boss was a bit repetitive for me. I would add a bit more to the loop if possible. It would be nice to have some audio or visual indicator when the rail gun was ready to use- I know the meter is there, but it would be satisfying to have a cue when you could fire.
Overall, this is a solid entry. I'm a big fan of the purrlice.