Version 1.3.0 has been released.
This update was a big change.

v1.3.0 includes 5 updates.

• Playable on Linux. (I tested on Ubuntu 17.04 LTS)
• Simplified control.
- Without pressing simultaneously. - Move by using an analog stick.
• Button pictures show nearby player. You can notice which buttons you should press easily.
• Modified image of fixed light. You can notice whether it has a switch and it is rotatable visually.
• Improved controls on menu screens. A cursor move by HOLDING arrow keys (or buttons).

Select 'Tutorial' on the title screen to accustom to new controls.