It spews random characters for every one that you hit (beginning, thankfully, with the character you actually hit). There's no way to back out of this window without going through with the account creation, so I had to tediously put in my email and passwords by typing a letter, then backspacing all the other crap it threw out. Very annoying.
Also, the external file browser crashed the game when I tried to pick a song. It let me navigate all through the folders, but threw a runtime error (sorry, didn't catch the details) whenever I actually picked a song.
Other than that, the game is very playable, and fun :)
cxgames Linux, 9.0.0