This was a lot of fun to play! Running around and watching the bugs burn is a fun concept. This game has a nice gameplay loop that has a lot of potential.
Here are just a few recommendations for the game:
* I think the fuel system for the flamethrower is pretty interesting. but maybe it should be changed to a overheat mechanic. It's fun running around dodging bugs to collect fuel but once your out of fuel and there no more fuel on the map to collect your just sort of dead, until one randomly spawns. I think with an overheat mechanic you'll be able to burn bugs indefinably but also have to watch out from overheating the flamethrower so it doesn't get too hot. This means you have to have good position still so that you don't get yourself in a situation where your flamethrower has to overheat.
* I noticed the power ups that would spawn once and a while which are a great concept. I would maybe make them spawn more frequently the longer you survive. Also permeant upgrades would be neat! Like more dmg, speed, or more special effects like a fire DOT.
Again I had a lot of fun, even though I was only able to survive for 2 minutes at a time lol. Props to you for making this awesome game. Keep up the good work!