Just a little tip if you are struggling:
Blue (Top) - Knight (Upgrades: attack, defence(only if other option is push)
Middle Lane - Spearmen(Upgrades - Push, defence(if attack)
Bottom - Wizard (Upgrade: Same as knight)
Shop: Mana Regen, Ice, fire, push, bertha, max mana, max troops x2, health)
You can use 1,2,3,4,5 for the bombs, respectively. If it helped please upvote ;)