Hey cool, another 3D game! It looks really nice, and I appreciate that you made the models yourselves. I also really liked the dialogue boxes. They made the gameplay feel like it had a context, creating a much more exciting and immersive experience with just a few portraits and lines of text.
Like a few others said, I felt like the aiming seemed a little off at first, although I eventually got the hang of it. I think it has something to do with the perspective, and the fact that where you're aiming in 3D space is ambiguous and depends on the depth. Putting the cursor over things that need to die worked well enough, though.