Hello,
Thanks for the comment. The good looking pixel art is from a french artist called Emilie Gaujé,
http://www.apitchou.com/ (the portfolio seems buggy those days !)
I signed the jar file because I though it needed to be to be excutable on java web start. The game don't need to have access to all the computer, the game only put a .RedIsle/save.dat file in the user home directory. I think I have to learn more about that.
The gameplay is quite old even if there are some improvement, I though it was enough for a 1st try and I mapped the level so as there is always clues about the traps. I also put an auto-checkpoint-save file that allow to continue at the last map change (after dying or stopping the game). But you're right, even with those helps it is quite frustrating to die at 90% and a lot of people tell me that it is too hard or frustrating !
I maybe must add some healthpoints or checkpoints !
The reason why I don't think to go further on this game for the moment is that the gameplay is not original. Actually the game was taking dust in my svn repository since 2007-2008. I decide to share it last month cause it has a complete world playable and maybe it could interessed some people. I also start another projet, after 2 or 3 years sleeping. I think that learning from mistakes and feedback is a good start !