Thanks for playing, and for the feedback.
Upgrading the Sorcerer only decreases his cast time by 1 second each time (Starts at 15 seconds). It would probably be more "rewarding" for the upgrade, to adjust it by "10% faster casting" instead. This would greatly increase the "feel" of the upgrade.
This has been added to the backlog of balancing the progression of the game.
While the current balance has its flaws, I'm not sure that a straight percentage increase would be a strict improvement. *tries to do the math* wait, they're surprisingly similar? But the current one is much more potent in the end (given I've modelled it correctly; it's bedtime)
https://www.wolframalpha.com/input?i=plot+f%28x%29%3D15-x+vs+g%28x%29%3D15*0.9%5...
I did enjoy the sorceror finally getting off his butt at the higher levels, in particular the final one where the relative speedup is yuuge.
