Is this a P&C game? (Mouse-only)? Thanks.

I had different glitches different playthroughs (couldn't end game did things out of order than walkthrough, then arrow to change scene at beginning wouldn't show up even after I tried crowbar on floor door) if you have problems and deleting saved game from main menu doesnt work, you need to not only uninstall the game but delete the dduo folder under appdata locallow. After a couple of times that worked for me....

Is this game compatible with Windows 7 ? The requirements only list: Windows XP / Vista / 8 / 10

I have done this section over 2 dozen times. I have watched the walk through , multiple times. Even stopping to do each item one at a time to make sure I am getting it correct. I have uninstalled and reinstalled multiple times. I have deleted the save repeatedly and started the section over. But no matter what I do, the water and crystals will not combine. It was bad enough just trying to get the game to play in English. Has anybody else run into this ? And if so how is it corrected ? Thanks in advance....

My desktop is a 2560x1080, and the entire game is stretched, how I fix that?