But did you install the proper FModEx SDK and added the locations in CMake GUI? Else you compiled without sound.
BTW have you compiled the 64 or 32 bit version? I guess x64.
I added a pistol start option to LZDoom and it was not possible just disabling autosaves, besides it would break hubs. I think it was even in the menu.
I've discontinued LZDoom development, there won't be more releases unless there's a major bug.
What's the problem with double spawn now? I should have made it in two passes but i did it in one so some of the original monsters won't spawn due to being blocked buy previously doubled ones, the feature was ported from RUDE. As i stated i didn't know that some functions were exported to ZScript when i added the feature so i guess it could have been made in a mod.
LZDoom 3.88b is compatible with OpenGL 2.0 and higher you should use that. Besides there are more recent than 3.5.1 unofficial devbuilds of GZDoom Legacy.
https://devbuilds.drdteam.org/gzdoom-vintage/
For me GLES also crashed on an Intel GMA 4500M.
I've released 3.88b. It's mainly a bugfix release but there are some new minor features, see first post. Unless there's a major problem this will be the last release.