This is a quick test of a mechanic I came up with while I was playing Asteroids. I felt it would be an interesting mechanic to try out. The player's position in the world is reflected across the X or Y axis when the player presses C or V, respectively. Once I made it, it reminded me of Nightcrawler from the X-Men comics, so I added a little "Bamf smoke cloud" to where the player was when they teleported. It could be utilized in a retro style platformer similar to Kid Icarus, comparatively to how Pit in Kid Icarus has to use the Wrapped X axis to climb higher in the world.

Use Arrow Keys to Move Left and Right
Space Bar to Jump
C to Teleport Horizontally
V to Teleport Vertically