Thanks for the game Melongun!
I played three rounds, all wins.
The first round I used the WASD keys, upgraded the Ero Cannon ASAP and got a lot of upgrades in a row after mowing down the group that was following me. After that I stopped getting upgrades, reaching level 100+ by the end of the level.
The second round I used the mouse control, clicking on the character. It felt weird on pc, it was hard to aim at first because you have to click around the character instead of the tank, but I think I got better as time went on. I stopped taking upgrades at level 12 and won.
The third run I tried taking no upgrades and avoiding enemies. I got hit twice during the run, but I was able to win without picking up a single cog.