Thanks a lot for your honest and detailed review :)
We have already fixed the movement and jumping mechanic in a new version and now the character is much more responsive , this version will be uploaded after the voting period ends :) (also the credits button issue was fixed in this version )
We were also considering adding some checkpoints to avoid the player from frustration :D as it was suggested by many of our reviewer.
Thanks again for your review :)
We are very happy that you enjoyed it :)
Don't forget to rate it :)