Fun game. Wasnt sure I would like it first going in, especially since im not to big on platformers. But this was fun. Got to the ending of the demo and will be waiting to see more of this game!
I played it on linux and I dont think I ran into any issues that would be OS related.
It feels like you move faster when going down a slop than when you move normally or go up a slope. Felt a bit odd.
I found a glitch, where if I opened a door while a slug was crawling up it, the slug would fly over to the next wall. Just guessing here, but seems like you have the gravity that affects to slug rotated when it climbs onto a wall or roof? I think resting the gravtiy to be downwards if the slug has no gravity based collision would fix the issue. Or just keep it cause it looks funny and not too out of style for a creepy space slug.
The ability to look up or down while standing still would be nice.
Maybe its just cause im a noob, but the flying bugs almost filtered me. It be nice if they died once they hit you. shooting at them gets weird when they are stuck hovering over the plater body. The shooting works fine, its just at least in my head feels weird to point at yourself to shoot them.
Thanks for the fun demo and good luck on the game!