Got to the yellow portal three times, which seems to just kill me immediately (or is that the end of the game? Maybe you should let the player know). Tip for improving the visuals, try to get assets of a similar resolution/detail as compared to the scale they appear in the game. For example the lunar surface texture of the platforms was way higher (and sometimes stretched) than the texture of the portals or the texture of the background. I thought the resolution of the lava looked just right.