I had a great time with this short game!
It reminds me of Alien breed, GTA1&2, Hot line Miami and Ape out, just to name a few ;)
The general atmosphere is really good. Playing on dark and light areas works really well. The sound of the creatures gives me the creeps. Having a safe room where you can go back to upgrade but only if you use some gas that you need to exit gives some nice tension. Controls are sharp. Visuals are simple but effective. Bodies...
Overall it is really well done and fun to play!
Here are some little things I noticed:
- during first run, I had a huge lag each time a shader was used for the first time (I played in web browser)
- I would have gone for another kind of music to give more tension
- maybe spawn all items only at beginning of the run, in a number enough to win but not too many so that it's not too easy
- items sometimes spawn inside walls
- in the weapon upgrade, the left and the right have the same name
- some sprites could be redrawn so that they are easier to understand : gas can is good, but all the other items... well I'm still not sure which is which ! Also it took me a while to understand what the right click was for.
- adding gas to the back door's engine uses ammo... I guess that's a bug :)
- items are always visible which is good in terms of gameplay but I find a bit weird in terms of immersion. Maybe not making them emit light but instead add a detector in a corner of the screen showing where there are items near the player.
- death could be more dramatic
Things about gameplay I thought you could do to build up upon this very good basis:
- Creatures could invade the safe room when it's dark
- Several levels, gradually increasing in size and difficulty
- Add different creatures through the levels, with different behaviors and attacks.
- Add different weapons through the levels
Well done!