Guys, I'm going here soon to post an updated version with "more coarse" bugs fixed.
http://www.mediafire.com/?196o9s34c1wp3l7
I'm downloading it now and will play it soon, and then post here again (or edit this post) with my experiences to help you out.
EDIT: Okay, just played it! Firstly,
WOW. That was pretty darn fun to play and I enjoyed every second of it. It feels just like one of the games in terms of menus, sounds and... just everything. So great work!
When I first started the level Jagged Jungle, everything seemed to move a little bit slowly, but after I reached the Bonus Level, everything went to normal speed. Not sure why, probably something on my end, but hey, it happened.
The controls all worked pretty well for me. If anything, the movement for Rambi and the throwing of Kongs is a little different compared to the original games, but everything worked and I adjusted to the minor differences easily.
Overall, there wasn't anything in there that messed up the gameplay experience as far as I can tell, so for a demo, this is really coming along quite nicely and I am very happy with the demo that I played! You should be proud of this, it's come so far and is looking very good!