I managed to open this using Winzip, so I should be fine for a while but I will use this one seeing as it looked like it was free. The game was challenging and fun, the only real problem I had with it is the milk it keeps pouring too fast and leaves very little room for a gap in the first jump. There's nothing wrong in the sewer one (unless it was one of the ones that was fixed) as it leaves ample time to go to the safe spots too. The penut one took a while to figure out, but it gets easier once you figure it out, I mean you were going for a trial and error gameplay anyway right? ^^
For fleshing out the sprites in the game overs, I think I know one person who is capable of doing that and his name is Unnoticeable person. He should be able to help you out there since he makes transformations using sprites. Here's his FA and DA page.
FA:
http://www.furaffinity.net/user/unnoticeableperson/
DA:
http://casetermk.deviantart.com/