The flags got me for a bit, sneaky.
Didn't even notice/pay attention to the colors on the barrel, thought of it as the hazard stickers we put on any chemical barrels, so wasn't paying attention to it, until I stared at the safe for a good five minutes...lol.
Your Game Stalker
Sponsor Clau-Dia, thank you for the 'Sponsor'-ship
Most puzzles are easy to solve. The colourful flag one is a little tricky but I somehow get the green gem by following the left-right top-down order.
Thanks to the walk through comments, the 3-digit code clue was on every OIL can.
Very nice game!
Simple but entertaining plot, awesome music, nice art, nice and not over-brained puzzles!