It's pretty much exactly Crazy Kong, as far as I know, though I could be wrong.
Brian, that's a very good score for a CK variant. You're so close now you should try to get it done.
Haven't played this one, so I just gave it a quick go, as far as I can tell the similarities/differences are:
1. Barrels
You can climb ladders barrels won't fall on you the same as CK
No gaps in the girders as there is in CK from Lvl 2 on
Top hammer is easily accessible
2. Pie Factory
Conveyors don't get faster from Lvl 2 on as they do in CK
3. Elevators
Seems to be exactly the same
4. Rivets
Seems to be exactly the same
Of course there are the obvious differences, title screen, ugly as sin colours and no noise when you collect prizes.
Interesting variation, might have to record a game for MARP. Given the top hammer is accessible (well a lot more accessible than CK) I'd be guessing that the MARP high score of 685K should be achievable.