When i start the game, logo is shown, then screen goes black - no picture, no sound, nothing.

Problem: Starts up to a black screen. Steam overlay, if enabled, pops up, but leaves artifacts on screen when it disappears. Mouse pointer appears to render fine after hitting escape (after an intro screen?), but the rest of the screen stays blank. Sound seems to be playing fine. Platform: Arch Linux x64 on a ThinkPad X220...

is points shop disabled?

Problem: world 6 achievemtns don't unlock! neither the one for completing the world or the one for perfecting it. Platform: win 10. How to reproduce: I don*t know Expected result: i should have both achievemnts by now, i can add a screenshot for this. Additional information: somehow i played the world 6 before world one. it was possible to select at game start; maybe that triggered the Problem. PS: can i provide a savegame somehow?...

Hey, I am trying to complete all achievements but I am stuck with both last ones : Towards Singularity and Clone Hero. I have perfected all worlds but I think the issue comes with the fifth one. I finished many times the world 5 random boss in different ways (with or without skip / powers) but it never unlocked the green square or X on the world selection menu. I also tried to finish it without taking any damage, it didn't work either. Am I missing something ?...