Hey nice game! I survived only for 4 minutes, lol.
I loved the web trails the spider leaves, and I'll probably incorporate them in my game as well 😊. I have a similar game, and I'd love your opinion there https://beorgames.itch.io/hero-battle-fantasy-arena.
I also think that there are some stuff that could be improved:
The character seems to slide a bit. I'd change the movement, maybe speed up the animation as the character speeds up?
I also don't think an expandable tank brings much to the game. If you spend all your gas, you're dead, because there are no other ways to kill the enemies.
It would be helpful to have a timer showing how long the buffs last.
Also, the shield is overpowered. It's like instant full health + full gas because you can just stay there and get hit without anything happening.