The end ? Why there is a question mark? Is there any another ending or implication of next series

Only this game does not play with my controller. Steam recognized my controller, and all other games played smoothly. What problem needs to be solved?

Tried rebooting and reinstalling but doesn't work... My device specifications are 64bit, Window 10, intel core i3, 4GB RAM, and 20GB of available space but all I got when I opened the game was a small bar in empty black screen... Can somebody help me?

So in the final boss there is the orange glowing pillar thing but i don't think that there is a powerup for it? all i find are double jump, ram charge and flight.

I've made it to (what I think is) the ending, where Sheepy gives up all his powers and the gigantic Stargate-looking portal lights up with Sheepy and Patches next to it, and the whole place starts falling apart. At this point the game gets stuck, meaning that nothing more happens. I looked up the ending and it seems Sheepy is supposed to grab Patches and go through the portal. But for me they just stay frozen next to it and nothing happens. After leaving it for several minutes, twice, I realized that noth...