As you might guess, there aren’t many players to play with right now, so playing in casual mode is quite impossible.
Moreover, I am currently (unless I buy a server in the future) unable to implement a real multiplayer feature.
The fact you both need people to play with and hamachi in multiplayer is really making it only to play with friends.
I hope to have someone to do some art soon in the future, allowing me to make a story mode, but for now, apart from training mode, there isn’t much to do.

PS: Please remember that it is possible to personalize your keys in settings. It includes also audio settings.
PPS: If you know someone or are yourself able to do some art, PM me.