What did you change? Only curious to know as I don't mind any problems with the old version ;)
oh just to note, it looks like if you take more damage than you have health you can still die. I noticed this on the campaign levels 16-XX. I was as upgraded as much as I could be so the only way to avoid it was spam the attack as fast as possible while on auto mode so everything died before it had a chance to attack ;)
Of course, its no big deal but in case anyone else says it doesnt work on those levels, it does, but thats why it appears it doesnt ;)
Thanks for modding this one by the way, it actually quite a fun little game :)