Example how it works.
Step 1 .... I send some Btc amount lets say .. 0.1 Btc to the exact wallet
You see, even his example amount was 0.1 BTC, HIGHER THAN ANY BET YOU BOTH MADE, and there was no mention of a maximum bet amount.
Now, it is a scam, because he's getting out of paying you the owed excess. Whether he overlooked raw transactions or not, he still owes you because of what he stated in the OP. Time for some red, and it's justified now.