cool idea, nice idle game :) For me everything got locked in the shop after the first purchase. Like even if I had the resources it didn't let me buy it. I'm not sure if it is just me, but other than that I really enjoyed playing but I checked out at the 3 dragon because it got pretty slow without more upgrades. Good and polished game, very impressive!
Viewing post in The Miner Scale jam comments
the shop *should* be work fine to progress through upgrades, Seems like you ran into the same problem a few people have been having where the water and air shards are a little too similar looking when they are shrunk down to the icon size so you think you have the right resources for an upgrade but you do not. Possibly will have to do some re spriting in the future or swap the order of the dragons to put some separations between water and air to make the differences in the sprites more clear. thanks for playing :)