Symmetric Ascent

The screen is divided into two mirrored halves. Dodge the triangles that descend from the top of the screen. Use the arrow keys or WASD to pilot both your craft – each craft will mirror the movement of its other-half partner. The pattern of the triangles in each half of the screen will be symmetrical… at first. Good luck!

Source – Love2D archive. To run this on Linux, install Love2D, then run “love”.