Amazing how you ruined all the goodwill and your rating with a broken update that deleted saves and made the game a buggy mess with unfun reduced progression speed. Shame.
Play speed is buggy (enemies get missed/skipped by the beam and tower fire). Game just hard stops after level 50, no win screen or game over. Otherwise, a solid old school TD game. Fun enough to play through to beat level 50.
NEEDED UPDATES:
* Upgrade all option for upgrading buildings (like repeaters to See Invisible, etc).
* Buy 10, Buy 100, Buy Max options for skill tree. It's *really* tedious in the late game.