I have a similar issue with the top of the dialogue panel being covered up in a white block. It persists even in fullscreen mode and changing the resolutions options in Windows.

Existence Eraser is the final inventory item in the game.
It can be used to overpower a girl and knock her unconscious; and means that no one else can perceive her laying on the ground. It's pretty funny to see.
Based on testing, it works after a girls pleasure bar has filled 5-6 times. After she climaxes 5-6 times from the highest level creampie sex, the "Dress" icon changes. meaning you can be certain that her existence will be erased. Regardless of if the timer runs out, or if time is manually resumed.
Edit: She must climax at least 5 times; and the penis must ejaculate 5 times inside her pussy.
Easier to do with max upgrades in the first few schools.
Lastly after maxing out the jump skill, I was somehow able to perform a super bounce that gives you maximum upwards momentum for a bit, which at the max height can sometimes take you all the way up to the ladders and shields section.
It was a bit inconsistent how high I needed to be at first, but I found a somewhat reliable method if you need to test for bug.
Quick question: is the demo official over after the first boss (the flying fire witch)? I couldn't find any accessible paths with the second spell.
Unless you count pressing Q a bunch. I somehow got stuck in the wall geometry in several places and wrong warped to after the END blocks. Then I was able to make it to another boss who was way to strong for me.
This game is very fun. The controls are simple and can be remapped. You have to reload your checkpoint to return to the last place you saved which can be annoying. At least there are several levels and they have good map design.
Things I learned while playing:
+ The more you fill up your white bar, the more damage you deal, which balances some of the difficulty with some later enemies
+ Also I learned that enemies you subdue can wake up with a heart symbol above their head, which means they are your temporary allies and will fight other enemies and other enemies can target them.
+ If you subdue an temporary ally, they will flash pink and become a permanent ally. Even if they are defeated by hostile enemies. Plus you can carry and keep subduing allies 💕
Honestly, this is a pretty great visual novel. Seriously good job Double Moon!
The gameplay revolves around building energy or spending energy to influence the decisions that the main girl makes. Which in turn influences how much she likes you and who she builds relationships with.
The scenes play out in different order if you don't influence her, so your decisions change the flow somewhat. And some repeatable scenes can change if she likes you more.
Version 0.8.5 has no endings so you can keep improving your relations with everyone, though I suspect that will change once they are added in later. Because there are no ending in this version, you can work towards all H-scenes of which there are a lot! The game also runs really well on my potato computer :)
If I could make a suggestion, adding a gallery would be nice for revising old H-scenes or seeing variations of the same H-scene. That would also be a good reward for multiple playthroughs when endings are added in.
Edit. Forgot to mention, exchanging 10 energy to remove 1 occult is probably not balanced enough since Zoe can easily earn back 5+occult points in the late game.