Cave Story crashes my computer or the music cuts off
Go to Start Menu -> Control Panel -> Sounds, Speech, and Audio Devices -> Sounds and Audio Devices -> Audio Tab -> Sound Playback Advanced -> Performance tab -> Hardware Acceleration and set it to either 0 or 1 (Emulation or Basic).

If the problem persists then you may need a different sound driver in order to get the game to run correctly.

The text overlaps in Cave Story
If this happens then you need to update your nVidia drivers on your computer. Up-to-date drivers can be found on the nVidia website   .

I can't save!
Search for a file called Profile.dat and under properties uncheck "Read-only".

I press ENTER at the title screen but nothing happens.
Try using the "Z" key instead. The keyboard controls for the game are Z, X, A, S, Q, W and the directional keys.

I am using the Z key, but it still won't work.
Run DoConfig and uncheck the checkbox on the top-left labeled "Use Gamepad". Now click "OK".

I try to get the last puppy, but all he does is say “Arf!”
Make sure you have talked to all of the Koron/Colon again (the Mimiga raised by Curly) and then talk to the puppy again.

Exiting the Outer Wall causes the game to hang.
This glitch can occur after viewing the map in the outer wall while playing the WiiWare release of Cave Story (this may be limited to the initial US release as the bug may be fixed in later releases). To solve this problem refrain from using the map while you are climbing the outer wall.

In full screen mode the game only occupies the upper-left quadrant of the screen.
Right-click on Doukutsu.exe, select properties, click on the "Compatibility" tab, tick "Run in 640x480 resolution", and hit OK. Do not have this set if running the game in windowed mode.