I enjoyed playing this.
Here is my setup though:
I hope you take this the right way as I think this is a cool concept! It's just I didn't really feel threatened as I was playing. None of the monsters made it past the first 2 or 3 towers so I think it could have been more difficult.
I can think of a few things that would help:
- Elements might have effects, e.g. water slows, fire makes them move faster but does damage over time once they're on fire, etc.
- Some enemies might be immune to some things - I didn't feel there was any strategy to which gems I used or where I placed my towers. Maybe some synergy with which types of towers are near each other.
- Maybe something visual to show what I was protecting? A castle or a tower or something rather than just "HP Left 25"
Overall I think this is a really cool concept. I think there is a lot of potential here I'd be happy to play again in future if you continue to make updates :)
Good luck <3
Aegis 🛡