Thanks for the comment. I know it is not the best optimized game (I'm a graphics b**** xD) but I guarantee there's no bitcoin miner included, I wouldn't even know how to implement one.
The game runs fine on a low to mid-range (200$) gpu like an rx 6600. My rx 6600 manages to keep steady 60+ FPS on Balanced Graphics Settings at 1080p (the game shouldn't be too cpu heavy, therefore I'm only mentioning the gpu). I honestly expected it to run better on lower end devices, something like atleast 60+ FPS on Performant Graphics Setting at 720p, but it seems like that wasn't fully the case.
I'm sorry I didn't optimize it enough/offer enough settings for everyone to be able to properly play it.