Honestly I'm surprised anyone used my stuff. ^^ Still decent game. Keep trying. Can only improve over time.
Actually, the graphics are really poor, and the inconsistency of the gameplay is annoying.
...MS Paint - the game...
The controls are sloppy and the graphics are... sorry but they actually are poor...
So my advice would be to get your hands on Adobe Flash. It's way easier to create some decent graphics in Flash and the Language is easy to learn.
For matters of music: There is free music and license free music out there if you were to google about that I'm sure you can find your source... in case you really want to make your own music I can recommend Ableton Live or if it should be free Milkytracker (http://www.milkytracker.org/). Milkytracker will need some time for you to work out how things are done, while Live basically comes with everything set up just waiting for you to start making patterns or playing keyboard.
... So what I would try is to get one catchy melody ... just like a few tones, now try to alter that melody a little bit, it can already be enough to set the last note down or up... but it's something you can try and error... you will hear it... now the 'trick' can be to just use the same melody over and over again (but not too many times pls) but to use different instruments for it. you can also shift the melody one octave up or down... maybe more just hear what works for you.
Okay if you got your melody set up you also need a ground beat. you can start with the beat or the melody it really doesn't matter. By altering the ground beat when you change the melody instrument you can already set a new setting to the music... just try around with a second layer like a bass instrument ... something like that, if you got the basic melody and it's alteration you should be set for experiments.
The game play is okay but the graphics and the music really kill it if you ask me...
I think if you want to rework this it could become an okay game.