I think you game works just fine, and what else would you want from a tower defense :D Good entry!
A couple of things I would like to comment on:
- I really liked the description, it inspired me to try my best while playing. But I am not sure that you can get that kind of impression from the gameplay itself! I would love to harness the power of fire and air, collect mystical shards and enhance my alchemical prowess. But right now I rather click here and there rather than I am a powerful alchemist :)
- It is not very clear, what some elements actually do and why they are important. For wxample, crystals: why I should use different types of them or how the different spells differ. I can see there are different effects after you combined two effects, but I can't fully comprehend it and notice the difference in the attacks. They all just seem to damage, and I would like to see maybe different damage types more clearly (a frozen enemy, or an enemy on fire maybe). To have more feedback from the game itself would make me feel like my impact is actually meaningful :)
- I think that the difficulty level is pretty low at the moment, the resources are too easy to achieve. And I didn't need any kind of strategy to beat my enemies, so that feels like I just can place towers as randomly as possible :) It would be better to have more heated battles after 10 minutes of gameplay at most, imo.
- After I have built enough towers, I could just watch how the game plays itself for 10 waves now (it is still playing, and I am watching :D ). A quicker pace in difficulty changing would be also nice!
- Something that caught my attention from the beginning — it seems a bit illogical how the enemies go around that small island before attacking me. Why are they actually going that way, only to get more damage? :D I didn't need that section as right now the enemies can't reach this point, but it got me thinking a bit at first.
- It was a bit tricky to click on the right tower when there are many of them. As far as I understood, it is because you should click on its base but not on the tower itself.
Wish you luck!