What To Do
Green Arrow - Jump
White Arrow - Slam
Blue Bomb - Throw Bomb
***WHAT THEY DIDN'T TELL YOU IN THE 1-1 TUTORIAL***
Blue Steel Box - Jump
Blue Steel Pad - Slam
Balloon - Slam from above
[The Balloon setup is typically a jump (or double jump) to get above it and them slam down to pop]
Golden Cog - Throw a bomb
[The Cog placement is there so that when you throw the bombs at the moment of grabbing them it will destroy the props in the background that you normally would miss if you only did the jump and slam actions. Crucial if you want a 100% Mayhem score]
[If a Cog has a blue faded line going through it, typically under a balloon, you don't have to throw a bomb there. It indicates that you are going to have to slam/fall through it to obtain it.
***Most levels follow this layout of game play, and some may vary as you play, it's just a matter of reading each level and seeing where these can be properly applied.***
Thank You
Hopefully this little tidbit of information helps you and your potential confusion as to why you didn't get a full combo.
If you want a visual on what i'm trying to get at here, this video made by MarsensDomain shows beautifully how 1-1 is supposed to be done with 100% accuracy.
Source: https://steamcommunity.com/sharedfiles/filedetails/?id=2657438555