All units:
Normal - just a basic unit
Fast - He is fast , but weaker
Strong - Have more hp , make more damage , but is slower
Cloner - Every 9 seconds spawns 2 clones
Clone - Small unit created by cloner , is weak unit
Giant - He is big , have big count of health , do more damage , but obviously is slower
Spy - Every 2 seconds change colour so enemies can't attack him when he is colour of his enemies.
Have more hp.