Thanks. The F key toggles flying mode, and perhaps that mode is on by mistake. I will double check that double jump!
Yes, sticky wall. I will try to address that. It's a common issue and an issue here in my roll your own 'game engine'.
[fixed] Double jump fix
[fixed] Sticky wall fix
[fixed] Limit bullets and jumps
[added] Add ladder type behavior
[added] Start and stop one way platform example
[todo] Add more think outside the box levels
[todo] Disappearing platforms
[todo] Gravity enabled platforms
[todo] Angled platforms (too buggy, probably not)