This was mostly a test that I turned into a game (don't worry, I have plans to make an actually good TD game) 1-4 keys to select a tower, click to place, space to start a wave. 0 lists used (crazy, I know).
TOWERS: Turret -hotkey: 1 -cost: 50 -Good in groups -Bad aim -Cheapest tower -Second-longest range AOE -hotkey: 2 -cost:60 -Area Of Effect -Good starter -Better aim Freeze ray -hotkey: 3 -cost: 65 -Most expensive -Slows down enemies -Doesn't do much damage -Good with others Sniper -hotkey: 4 -cost: 50 -Second cheapest -Sort of like Turret, with longer range and longer attack cooldown -Good with others