I have fixed some things in the game and I implemented some of the things that you guys suggested:
1) Now there is a switch button in the main menu that lets you switch X(jump) and Z(attack) so it is more comfortable for many players.
2) The return buttons in the menus are gone. Instead now you only have a flashing thing that tells you "A-Back". That means to push "A" in order to go back a menu. And in the starting menu if you press "A" you return to the game.
3) Added some new tiles to make the Castle kitchen/basement/torture room more interesting.
Some things I will not do. In youtube a guy suggested to make the torches/candles etc. destructable but I will not do that because this is not Castlevania game. Remember Castlevania is only an inspiration.
I am thinking of changing the attack sprite of the normal weapons (sword etc.) to something faster and more aggressive.
I am still waiting more people to test the demo so I could continiue adding content, but I guess only a few people will do
PS: GREAT thanks to TheouAegis who helped me in the Game Maker forums so many times!!! THANK YOU for helping a newbie to become better!!!