Prototype v0.2.4

First major more playable version of Space Strife!

After releasing an earlier 0.2.0 version to some friends I found out that the WebGL build didn't work on Windows. I've been mostly testing on Linux and macOS, and just assumed that if it worked on those platforms that it would work on Windows which I've learned is not the case.

The main issue is that the Unity Forward+ renderer seems to have some issues on Windows WebGL but works fine on seemingly all other platforms browsers (including Android and iOS browsers). 

The other issues found were to do with scrollable UI views in Android, for whatever reason the scroll view thought that the content size was much smaller than it was even though manually setting a size still resulted in a view that couldn't be scrolled. I suspect it's something to do with the canvas scaler perhaps but that'll need further testing.

This release apart from fixing those issues brings some overall UI improvements and some extra levels. The next main goal is to overhaul the UI instead of using stock UI elements and to add some more levels.