SummmerP &
Xaøs
Without to download the game I already can see a major problem with your project. It´s your chosen image file format (&resolution).
Try this following and judge for yourself: Take one of your rendered 1280x720 png´s and open it with "Paint" ... then zoom in to 500%. Now open the
same picture again in another instance of "Paint" - but save the picture (save as...) in jpg before you zoom in again to 500%.
Why I´m asking you to do this you ask?
Simple answer: Even with the crappy windows build in painting program (which saves jpg images with 90% quality - lossy compression) you will have difficulties to find differences in quality between those 2 pictures -> BUT the jpg version is only 15-25% in size of the png version.
Now imaging further using a dedicated graphic software (freeware -> for example "XnView") where you could set jpg image quality to 100% (among many other more or less useful settings for you to play with) and still have an size advantage of around 30-35% compared to the png version without quality loss (lossless compression).
Imagine further more you could mark all images you want to convert and convert them in batch with 3 mouse clicks into the space saving jpg´s without sacrificing image quality.
What an efficient miracle this would be? *gg*
But thats not all (if you would like to improve your project further): Now imaging you render your pictures in 1920x1080 png (yeah, takes a little more time to render) and undergo these images the the same procedure. You get quality appealing pictures in HD format with file sizes around 25-35% of an png image (mostly way less than 1MB for per picture).
The same goes for the graphic format webp - there you have compared to jpg also the possibility to use them in layered images like to original png but still save a ton of space (file size) - Your and our internet connection will thank you - takes less time to up- or download your project
Of course you can ignore all this and do what you want to do ...
nevertheless I wish you both all the best for your project - I liked BBS (the original) very much and therefor I can see a lot potential in your version 2.0
Just test my suggestion for yourself and "see" the difference it could make ^^