Thank you for a long, hey almost a review :P, especially when it comes to your criticisms. I have indeed done a shoddy job when it comes to the upper parts of the levels and I will make sure to fix this problem in the future updates (need to draw some more stuff, and maybe place some chests with goodies? ^^)
When it comes to the crashes, what are the stats of your Motorola, the CPU and the ram? I've not had a report concerning crashes yet so and I want to explore this potential issue more.