Needs a few things
I'll just give you a quick list of what this game could do with below and hopefully you can work on these points, to make the game more engrossing:
1) Sound - get some sound effects via Google and perhaps a backing track from the Audio Portal. This would make a much better sounding piece and start to compliment the other areas.
2) An animation tune up - particularly when it comes to the lever, you might wish to look at where the animation pivots - don't forget, when the lever leaves the shot, it doesn't end. Attaching it to one area and cutting that part of the animation off screen might help you.
3) Better looking characters would help, as would voices for these characters. See also numbers 1 and 4 for this area.
4) A plot - Yes, you collected a giant crystal at the end, but we never find out why. Giving the player some sort of reason to get this going would really help and allow the piece to step forward, since the players want to play it and you'll be excited to get the next part released.
5) A little work on the drawing side of things never hurt and don't be afraid to take more time. Don't rush these things, just don't sit there doing nothing over them. Work on them and they will all come together for you.
[Review Request Club]