put your ocs in the sprites (1-10) (TD = tower Defence) explain it's abilitys or boosts it gives (or both) and also how much it costs to place and how much levels it has (also explain the levels by how it gets more powerful) also the costs of the levels, use the backdrops for the maps it should have (don't make the path too long please) put your enemy's into the enemy slots and if you want to make a boss put those into the boss slots and every boss fight needs a Guardian so put that into the guardian slot
...does no one have ideas...