Just finished the demo, played on the ds lite. I like the colours and characters in the game. The jumps and controls in it were fair and if I missed a jump it was my own fault. I found the Orange Island reminded me of Mario land. Took me a good few tries to finish the boss but that's good as it would not be good game design to be able to beat a boss on the first go. I have backed on kickstarter for the GBA physical cart and also for the ROM I just hope the shipping costs are not excessive as it would be great to have a newly released GBA game on an actual physical cart and instruction manual (game manuals extinct with modern games but I like to flick through them and feel cheated that don't get them with modern games)