Just tried this now, nice little game. I completely forgot that the game had an in-game map, so I was kinda confused what to do at first. Now I see that I'm just supposed to collect all the treasure, so I have plenty to do.
One thing though, I don't understand why jumping and up is seperate on this. To stay true to the original, jump and up would be the same, but context sensitive - that is, when you're standing under a ladder/rope he should just climb up instead of jump. Not a big deal though, just that when I play on a keyboard, combined up and jump button is easier than having a seperate button for jump.