Tried the arcade mode a few time on medium settings. Huge difference in the difficulties between the individual task, going from one task where you need to fill out 16 brix, and in the next you only have 7 and only one fuction. Then after completing 4 tasks I got a level with more spots than brix and it wouldn't allow me to finish the task even though I got the solution. It kept saying missing button, but I was all out of button. Tried repeating it on medium but got the same situation on first task. Seems there is a bug somewhere in the mechanism :(
 "Disaster Will Strike 2"){kind=icon}
 "DeCalc"){kind=icon}