Fun game. The tiny icons are a bit small for a touchscreen. Also, the game hit a wall after level 70. Everything is maxed except for the final x500 upgrades and progress is down to a crawl. I am just doing the level 60 boss over and over for 1.2E+14 ore in two hits. I think I'll need to leave it idling for a few days to be able to beat the level 70 boss without that flying cat bonus, and level 80+ will probably require years of idling.
Or am I missing something?