WTF JUST HAPPENED...I was at level 7 and about to kill their castle and all of a sudden these kamikazes with huge bombs came in, THEN THIS WAVE OF ENEMIES WITH 720 HP!
I can take out all the bottles in Bonus 2 with 3 shots
*Shoots bottle on tree*
*Shoot bottle under leg*
*Shoots assistant's stomach; All the bottles on him fall and break*
Here's a great tip that got me to round 7: Right click over the mouse chamber, then move your mouse to the enemy's head. When it says fire, left click like crazy! + if this helped
How to unlock the dragons:
First, you need Cthulu.
Once you have him, go to any boss.
Use your third attack, a character switcher, on the boss.
You will switch with the boss, and if you kill Cthulu, you get the Boss.
+ if this helped