The game was pretty interesting!
The style choice of merging 2D plus 3D was pretty interesting and it was cool to see it in action.
The game itself did feel a little slow, I know it's a tower defense game but I'd suggest raising the game speed or adding a speed up button like from bloons tower defense.
The camera was also very weird, maybe it's my mouse sensitivity but the sensitivity on the camera was way too high.
Overall it was really interesting, good job!