It's a dodge bullet with only bosses. Music is nothing special. I did not understand how to change from window mode to fullscreen. Start screen is a grid menu with sqares, top row selects mode, then lots of sqares for selecting stage, and bottom square to exit. You use the Z key to confirm in menue and shot in game. X key for power in game. P for pause. Game has no special theme, it's just abstract. If your big fan of bullet hell games, try it out.
So he spends all his time writing code for fancy graphics to set the game options and stuff, but couldn't find 5 minutes to write a help file?!?! All I could do was select some level options (meaningless unless I know what these options do) but as to how to actually START the game?... Who knows. Spacebar, enter key, mouse click... nope, they do nothing. I tried EVERY key on the keyboard... still nothing! So this was a total waste of time to download. Thanks for nothing Kenta. :(
Super-cool. There's a reason I love Kenta Cho's games. They're all amazingly fun to play!