Very charming pixel art. However having the blue ores only add to your max speed results in slipperier and slipperier movement as a level goes on. Goblins are unable to really be dealt with unless you have a raised plane or want to tank the damage as the ore throw really never has time to shine. Secret levels are nice but resetting the player back to the start of the level where the level was found with no progress is an annoying detail. It would also be nice if swinging your pick didn't kill all of your speed. Good menus, and a pretty well executed idea otherwise.