Abandoned Shop Escape

[Carts]

So your shop went bankrupt. Happens to many of us these days but you have a problem, since you've borrowed money from your friends who are now banging at the front door of the shop and want they're money back. You simply don't have it so you need to escape through the secret hatch that you so foresightfully installed when starting your business. If only you could remember where you wrote down the code and hid the key.

Abandoned Shop Escape

Please use spoilers for hints and walkthroughs:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.

[Mimizuzi]

A little different...I liked it. Out!

[Scissors]

Different, but nice. Out.

[old biker]

and out ,nice

[NannaJoy]

I'm having trouble with red key puzzle - thought it would be

b9g8y1r9 - even tried b5g4y1r5

Evidently not looking at it right. Also missing yellow key - which I thought would be here. Sorry - see yellow key - just can't get.
well - that was dumb answer .. or you might say I tried to make it hard.
nap time - sudoku is mind boggling this time. Maybe after nap.

[jgarrah]

this game sucks!! can't use cleaner with brush.

[NannaJoy]

use on yellow key - the spray bottle used on spot and then brush

Could have sworn I picked up the 7th key - but now don't see it. so have to replay from start as i've done all the puzzles?
I already restarted once as I failed to pick up an item to use after finishing a puzzle. Replayed puzzzle but not prize for second go around. Ahem ..
Mind elsewhere today .. I'll call it done and head back to finding secret passageways for the prof. Maybe nap again at 4. (3:30 here at the moment)

[minimaker]

I gave up on the sudoku thing and cheated. The rest was straightforward.