Experience and everything stays at 0... Does the "train" button do anything at all??? Need a gold/point/click counter or something, buttons just suddenly becoming available doesn't make sense...
EXP requirement reduction upgrades can actually reach 100% and then break the game. I upgraded the goblin one and suddenly my goblins were 10k+ levels and I had 100k+ Ragnarok points if I reset. The game almost froze from all the sprites on screen too.
Hm.. it's usually not a problem to click at the top. You don't have to aim precisely, if you click a bit higher it will still spawn the ball at the top.
Should be fixed. Thanks for the report!