As for the positive. I noticed no major bugs, it's actually really well built for the time I know you had. It's also simple to pick up, I needed no instruction it's very intuitive in spite no real visuals. All in all a good first game.
Okay, so as has been mentioned the tower balance is a little off, the AoE towers are nuts and the multi-target towers are meh.
I would say that the two big things that stood out was lack of enemy variety. I couldn't tell if there were more than 1 type of enemy, if there is then you need something to really sell that visually, otherwise you just need to add a few more enemies, on that note you do need to update the visuals a little bit I'm currently fighting music notes to stop them from getting to my green circle by placing grey cubes and spheres on teal circles. Next is that you can turn off the music but not the sound so I will always hear the turret shooting sound and that sound by itself gets old fast.
The games difficulty could curve a little more as well.
I fixed turning the sound off properly, I changed the camera view to orthographic because of comments during play testing so you can't tell what the models look like sadly... The towers and base are fully modelled. I'll try texturing them or making new ones for version 2 this week so you can tell what it is better! I've also had various comments on difficulty for the game, some people say it's too little a curve or too steep. Others say it's just perfect. I'll try to fix it a bit more - as always balancing to make it perfect for everyone isn't possible! Thanks for the feedback.
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I fixed turning the sound off properly, I changed the camera view to orthographic because of comments during play testing so you can't tell what the models look like sadly... The towers and base are fully modelled. I'll try texturing them or making new ones for version 2 this week so you can tell what it is better! I've also had various comments on difficulty for the game, some people say it's too little a curve or too steep. Others say it's just perfect. I'll try to fix it a bit more - as always balancing to make it perfect for everyone isn't possible! Thanks for the feedback.