I had a difficult time judging some of the jumps. I couldn't tell why - the Medium Mouse-Big Mouse gap difference is very similar... maybe that could be it? But then I realized... the platforms are all different sizes. So when you're jumping on the plank that stick out of the wall, it's easy to judge the exact distance you have to jump... but for the longer platforms, the Medium Mouse jumps only slightly past where the platform ends. It seems like the longer platform approximately covers the Big and Medium Mouse jump distances, but it doesn't.
All in all, a nice title! Very stylishly illustrated. A+!