It is a game I programmed for Arduboy
Thanks to this https://felipemanga.github.io/ProjectABE/ great Emulator I could make these gifs.
You start with a tank level 1 with a weapon of your choice. Everything can be upgraded till level 5.
With every updrade of the Chains the damage resistence increases a bit. The chain needs to be upgraded first to fit a next level Weapon. There are five different Weapons: The thing that looks a bit like an arrow is the driving speed, every update increases speed by round about 10 percent.
They spawn randomly at the right end of the screen.
If you kill enemys there is a chance that thy drop one of those items, pick them up.
This is actually the whole map. It is just for the variety of the background. It repeats infinitly.