Hey, great to know you loved it! We always enjoy getting positive feedback :)
Right now the plan is to work on a bit more balancing (the defense build seems to be a bit overpowered, and as you said, the game is a bit easy). However, we got some suggestions on including more enemies and evolutions (maybe a total of 15 opponents would be a nice amount, and 3 more evos should also be a nice touch)... so, that's a possibility.
But to say the truth, I believe it would be more likely that we end up making a sequel, that would have more things here and there, be longer, and more polished! It would be more or less a remake, with some new ideas we had along with time. Sadly, I can't promise anything... right now we are quite without time to work on this, with both work and study eating up our time.
Anyway, feel free to leave your suggestions, they are quite appreciated (really)! And once again, thanks for playing!