Thank you, Fabiano. This is an interesting and original game.
I wish soul sphere was more efficient, maybe increase power of the upgrades?
Also, I spot the following bugs:
* auto-build of mana cages doesn't work - new cage doesn't start building.
* limit for auto-build of shards doesn't work - new shard is build even when counter reaches zero.
* collecting lost spirit does nothing - it disappears, and I get log update, but counter stays at zero.
* mana cage III can't be researched - I can't pick it up with drag-and-drop.