It's gets way too difficult too soon. Maybe you can include a "hint" button that lets you see the level unfractured. Otherwise, it's just flat out guessing and frustration.
Stopped at level 4. Based on the comments, you need the rocket for higher levels, but the starter gun is too weak for tanks and AFVs. Also, the regular soldiers may lose life when hit, but don't slow down. Yet, you're awarded for headshots?!?
Starts out slow, then at level 4 you hit a darn gauntlet of enemies that makes you almost want to quit, but the next levels do as you can't earn more stars by repeating levels. Upgrades don't help. "10% chance of paralyzing enemy" isn't worth it, but more health is.
Have you taken a look at the walkthrough video? There's no audio but some great visual aid that you can draw ideas from. Basically, you save a Fireball or Plague Bane for when the boss spawns his bat babies. Once they spawn, hit all three of them at once with either of the spells. Then finish them off with arrows. Once the babies are dead, revert your attention back to the boss and continue hitting him. Rinse and repeat! The enemies that continuously come in from the sides should be arrowed down as well. Definitely check our the walkthrough video for some ideas!
Some suggestions, mention that you can manipulate objects. Some players may wonder where they're supposed to go and not realize this. Also, that invisible means can't be hurt by lasers, not just unseen. I thought I was just invisible to the targeting lasers.
Toastmaster, that's because the controls are WASD and, not or, mouse. Both set of controls work at the same time. So, you might be using WASD, but lose control to accidentally moving your mouse or touching your mousepad.
I haven't a clue what's going on other than it draws random patterns. I see 5 different speeds , but for what I don't know. I click on "show settings," see 5 different lengths, a term "alpha" I don't know the meaning of, and I don't know what "blend" means.
 "Glean 2"){kind=icon}
 "Free Fred"){kind=icon}
 "Fractured 2"){kind=icon}
 "Marine Assault"){kind=icon}
 "Snowball Battle"){kind=icon}
 "Tesla: War Of Currents"){kind=icon}
 "Dynetzzle"){kind=icon}
 "Frantic Sky"){kind=icon}
 "The Great Bazooki"){kind=icon}
 "Sentry Knight"){kind=icon}
 "Hard Point"){kind=icon}
 "Toetrix"){kind=icon}
 "Hero in the Ocean"){kind=icon}
 "Deadly Road Trip"){kind=icon}
 "SpiroStudio"){kind=icon}
 "Earn to Die 2012: Part 2"){kind=icon}
 "Diggy"){kind=icon}
Keep an eye out for connecting pieces (posters / trees cut in half, lampposts with the lamps in one piece and the post in another). You'll get it!