Thank you @Jmv38 for your compliments, I’m very happy you’ve liked it. On my iPad 2 the game works at 60 FPS.
It didn’t take me long except at the beginning, because I had to remember all about Codea, that I hadn’t used for a while.
I’m afraid my code is not very tidy, because it has grown in a rather chaotic way 
Chaotic? Mmmm that is not what i would say. Makes my own code ugly then … 
Anyway how many hours? Roughtly? 10? 20? 100?
I’d say 20 hours, plus the design of the levels, which has taken maybe 6 hours.