Hello. Thank you so much for your comment. This is the kind of thing we need to keep our motivation.
For the graphic part : at the beginning I (programmer) ripped all the graphics to make the forest. Then a graphic designer joined the project so it will get beter in the future. Also dark world does not have graphics yet (only colision data)
About the jump, how can we make it better in your opinion ? We tryed to replicate orignal game controls but it is the hardest part. We have come pretty close but still not perfect. (I don't know if we will ever reach perfection, as we do not have the original source code)
Thanks again for your comment :)