A suggestion: In Math Master, the more a problem is difficult, the more points it should give. Because right now 589 + 836 or 676/13 gives the same amount as 0x0 4 + 3.
Button gives you a small amount of coins/exp/boost (rare) everytime you click it. It breaks every now and then, and you need to pay 1337 coins to fix it. I reccommend clicking it 25000 times then stopping, because the achievements for it give a decent amount of cash. Normally clicking on it is not profitable.
All secret achievements: CHEATER: Press up up down down left right left right B A PILLAGE THE PET: Throw your pet at least 1337 pixels up KNOWLEDGE: Read or ignore 2000 Did you know?s from the background object Did you know? LOST AGAIN: Lose the game 50 times (Just equip Did you know? and you'll get this eventually) STILL WORSE?: Upgrade idle mode to 99.99% THERE MUST BE MORE ACHEIVEMENTS!: Click on the achievement ALMOST MISSED: Save up 100 mill coins SHUT DOWN EVERYTHING!: Feed president Madagasgar SUPPORT DRAGONEWYN!: Buy the free Floor and click on the text box in the corner THE GAME THAT NEVER ENDS: Get 999 (?)