I played your game a bit. Here are few notes:
- Game UI does not scale with the browser window in non-fullscreen mode
- After the first look, I was really hoping for the game similar to Orb of Creation, but yours is much closer to Cookie Clicker, which is of course ok, but less interesting for me personally
- I suggest to make costs on disabled buttons well-visible, since they are actually the main thing player stares at when he waits until next click
- I suggest some indication of available purchases on the tab buttons (e.g. number in parenthesis)
- Manual clicking income is not reflected in mana/sec making it much harder to judge relative efficiency
- Balance-wise, manual clicking is made obsolete way too fast IMO
- Since the game is Cookie clicker-style, I suggest to copy many useful features from Cookie Clicker UI, such as separate display of income for each unit type, and maybe combining unit purchases and upgrades on single screen
- After quickly reaching ~1000 mana/sec, further progression feels rather bland, since production units do not differ in anything except production speed. I suggest either adding more interesting upgrades, or, if they already exist, making them available much sooner.
- Text in “about” and “privacy” misses spaces after periods.