For some reason the android apk wont install for me, I really was looking forward to playing this, anything that could help? 
I've downloaded many apps from third parties, I even downloaded one from this site, for some reason this app in particular wont work. As for the antivirus, I've never had a problem installing anything before, I've allowed installed apks from unknown sources... and I dont think I have the means for said debugging tools, it would be rather convenient if I could just solve this issue from my phone alone.
This is strange. I've just tried installing it on my android phone and it works just fine. Total space occupied is around 300 MB. Although it's possible that the system file manager automatically prevents large app installs when there's little free storage left. I'm not sure really. Could also be the system reserving space for updates and stuff although i doubt it would be shown as user available memory. My best guess would be to try installing another app that's about as big and see if that works. And to try to free up some more space.
I have this problem sometimes as well. Even though it may look like you have enough space to install it android wont let you because it likes to keep some space free for system updates. In order for me to install anything I usually needs to male sure I have at less 2gb of space for any thing under 1gb in size. If that doesn't work try resetting your phone or tablet I found that this works some times as well. If you're trying to update it you may need to uninstall it and in install the new one. Some of the VNs on I got on my phone refuse to update and I end up haveing to uninsall it to get the new stuff.