This is a great entry! I am very impressed by the building mechanic you were able to put together for this gam. I am a fan of RTS games, and this is a fun take on the genre as you control a single character that builds towers on an ever growing force of enemies.
The particle effects on the laser impacts are great, and the SFX are a great fit. I ran into a similar problem with the text running off of the screen, but had a fun time playing your game!