Alright this game isn't worth playing I'm afraid.
1. After choosing your character/season you don' choose anything about the direction you go.
2. Barely any items/ weapons, same as 1 once again, this time you get some choice but it's really just random unless you actually pay.
3. Not much skill involved. Just takes time, point, click, move on.
Not much reason to play I'd say-- I had figured this out by level 10 for me but I still went on past level 20, so I can see why people are playing it.
the enemy will not attack or build more units until you have completely destroyed the preceding wave, just set your guys on hold position after killing all but one ranged unit, you can build up as much money as you want-- if you fee you need to beat the game, anyway-- im surprised this has such a high ranking