I've been ravenously playing TDs since Flash Element TD. This is by far the most interesting and well-thought one. I seriously hope you will continue making TDs.
Some tips:
- More towers, possibly cannon & poison towers
- More difficulty options: as much as I like this game, it becomes deadly easy once you get some upgrades
- Endurance mode of some kind. This gives the game a lot more longevity.
- More levels
And for the love of Thor, never make the game "rock paper scissor". That's the stupidest thing ever in TDs, some players LOVE their playstyle but they are forced to follow the game's scheme; this game instead supports every playstyle.
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Very!