The presentation is really good, the art is super cute, and the music fits the tone. The writing was good too, the dialogue was quite fun.
Gameplay wise though, I think it’s way too close to Plants vs. Zombies. All four units have nearly identical functions as in PVZ, and the enemy types also directly correspond. Because of that, it ends up feeling more like a clone than its own idea.
Now the base mechanics are implemented well and clearly work fine, it just feels like you could do more to differentiate it from PVZ. Maybe some unique unit interactions, Touhou inspired twists, or special enemy gimmicks, or anything really.
Now difficulty wise, I beat it easily on my first try without taking any damage, so adding some challenge or pacing adjustments could make it more engaging.