I like the concept of the game of thinking fast and identifying the enemy's weakness just by its visual appearance. That’s a great idea! I also like the tutorial, it’s very well done and explained. However, the explanation of the "Effect" attribute isn’t as intuitive as the shape or nature attributes, and it’s not as easily readable as the others.
The shape attribute is the easiest, it’s just matching the same shape, so there’s no rock-paper-scissors game there. Then, the elements require quicker thinking, like fire beats green, water beats fire, etc. It’s a bit trickier but still well-balanced. The "Effect," on the other hand, is much harder because it’s not very clear, and the explanation of why one beats another doesn’t make much sense to me. It feels significantly harder compared to the other two, making it somewhat unbalanced. Maybe making the "Effect" work like the shapes (just matching the same effect) could be a better approach. That alone would already be challenging enough, and compensate by making the "Shapes" a bit more complex by adding counters, like the "Nature" attribute.
Also, the block system sounds like a good idea, but I don’t really like how it’s implemented. Instead of actually thinking about the word and picking the correct letters, it ends being more like playing osu!—just click the circles as they appear. It’s perfectly doable, no thinking required. A way to improve it could be having a phrase or a word with missing letters, and you have to figure out the correct ones from a pool. If you select a wrong letter, you lose some time before picking the remaining ones. That way, it keeps the core gameplay of thinking fast and makes the word-completion mechanic feel more justified.
Overall, I really like the idea! The first time I played it, I was locked in because of the adrenaline from having so little time to think. As I said, there are some things that could be improved, but I think the game has a lot of potential for expansion. More levels with different gimmicks or mechanics, or even battles against multiple enemies where you try to optimize max damage, could be great additions.
Good gameplay idea, it has a lot of potential! :)