UGH!
Insane level 4 is so friggin hard! BUt I LOVE IT! it gets a tad frustrating hence boring since you cant beat the lvl without hitting that EXACT block you need to pop em all at once (like i did with insane 2 ;p) but yeah, just keep reseting and upgrading based on the level and your gravy, i got em aLL gold except up to where i am...