just tried this game so idk about past bugs, but i don't really see any bugs in the game now. (btw, defense is spelled wrong in upgrades but idc about spelling errors) the game is overall challenging and addicting, with good music that fits in well with the theme. the controls are basic, but i wish there would be more options with the formation, ie clustered formation or phalanx (those are just ideas though), and the upgrade choices are well done. i love the game overall.