it's a very big database, but it's easy to find something suitable ... on freesound, if you make a detailed search for files called "menu", which are 0-1 seconds long, you will get good results

currently, I use a simple format for the enemy generation
https://github.com/chumbalum/sidescroller/blob/master/levels/level1.txt

the levelparser just shifts that lines as character arrays to the game
https://github.com/chumbalum/sidescroller/blob/master/levelparser.rb

the game creates the enemies, depending on the character used
https://github.com/chumbalum/sidescroller/blob/master/playing.rb#L71

it was the first idea, that came to my mind .. it's easy to generate levels without big knowledge of the game and it was easy to implement, though it's not very flexible

hi, I wanted to show my current project I'm working on. It will be a 2D sidescroller with a space-scenario. I made some videos to show the progress:

http://www.youtube.com/watch?v=Y9IiTy0LsJg
http://www.youtube.com/watch?v=z6Mkoc1C9aU
http://www.youtube.com/watch?v=Q4z8X-5z124
http://www.youtube.com/watch?v=Miov3QkYPLw

the current code is online at github:
https://github.com/chumbalum/sidescroller
mainfile is game.rb

the media isn't made by myself, because I'm not into that

I used graphics from
http://www.lostgarden.com/

and sounds/music from
http://www.freesound.org/
http://www.newgrounds.com/

feel free to give feedback and comment :)