If you get metal and put acid on it then it gets electricity and if you put the energized metal in the whole screen filled with note then AAAH MY EARS ARE HURTING WHEN TYPING THIS HELP!!! .......... you receive A LOUD noise.
I beat the game with only 1 thing to buy left... THE DEATH RAY !! It's very expensive (12,000 blops ) and I spent a lot of money on the last bomb and lazer tentacle thingy upgrades. Mst of the money went to waste when spent 18,000 BLOPS ON THE SECOND-TO-LAST DART UPGRADES. Anyways, great game 4.5/5 it just needs saves , achievements and level replays so just blah blah my score is 97,616 when at the time I completed the game.
i got got the #1 award for most time played in seconds for the week,80,139 seconds but this is how i did it:I turned off the computer(Not shut down)and never closed the tab and waited for a day.
 "The Sandbox"){kind=icon}
 "Bloons Super Monkey"){kind=icon}
 "Red Ball 4 (vol.1)"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Interactive Buddy"){kind=icon}