its really depressing when a veteran TD player can't even beat level 1. maybe if I knew anything about what im placing down then i might have a chance. but i don't. You just "overlooked" that minutely huge aspect of the game, along with the fact that when you release new units a.k.a. cars, release them plain, not with sum healing thingy on them. It makes me frustrated at the fact that I don't know any idea how much health they have, and i never got to kill one. -5/5 in every aspect except visual design
just use mermaid, witch, goblin, dwarf, phantom armor, and something else( fire titan can postpone invisigoblin quite nicely. For spells, freeze and thunder. ESSENTIALLY, use anything that stuns in cave 5