Really nice tense mining game! I do wish the game would be able to save your stats like upgrades, score, money etc. When you restart, and also the lava can sometimes be faster than you mine, but other than that great game!
Its made as an arcade-style high score game, so its intentionally made to both make you lose progress when you restart and be relatively reliant on rng for a high score (think games like tetris, flappy bird, pacman etc)