Great game, really addictive!
I noticed a couple of bugs when I played.
1. turret aim is off - sometimes firing in exact opposite direction to enemies. This is particularly prevalent when the enemies are moving. Could be a rads/degs mix up.
2. I quit a game, returned to the menu, then started a new game. The level reset, but my resources did not, i.e. I started with loads of resources.
3. Late waves (40+) I see FPS drop enough that player and enemies start glitching through walls.
4. I can't find any use for the junction tile? If there is a use it needs more explanation.
And a couple of suggestions; Showing turret range indicator while before you place it would be handy. Also, hard to implement, but an online highscore would encourage people to come back.
Good luck with this, it's cool.