I remember that you were reverse engineering Liero as Joosa lost the source code. Also there were some other attempts to recreate the feel of Liero with projects like Wurmz etc. I kind of stopped playing Liero back then but from what I remember 'physics' in those clones was always missing something. So TIL that there is Liero 1.36 and I wonder if it can brings those old memories ;-)
That said, if anyone is interested in tweaking WebLiero mods and is not afraid to get their hands dirty, I wrote a (very rudimentary) program to convert .wlsprt to a folder of indexed-color PNG files and vice-versa[1]. You'll probably also want a copy of the "official" mods to use as a reference[2].
At the risk of counting chickens before they hatch, I am actually in the process of writing a mod editor in the spirit of LieroKit/LieroM8 that would smooth some of the rough edges of modding this game. I'm calling it WebLieroKit, unfortunately due to the timing of this post making the front page I cannot provide a working demo but I felt it was worth mentioning while there are eyeballs around.
[1] https://phazon.xyz/files/liero/wltools.tar.gz [2] https://phazon.xyz/files/liero/mods.tar.gz