I have successfully made a new version of the game and uploaded it to steam.
This is a very experimental phase for me. I'm still learning more about navigating through Steam than I am about game development. But progress has been made.
In terms of game play, the major update is that I made robots patrol. Some patrol very fast, and are quite dangerous because of it. Other groups patrol very slowly, and one of them is homing in on the player continuously. The entire game was rewritten from scratch (not that there was a lot there) because in my first version I made some very poor choices about using git and laying out my Unity project. I fully expect a third rewrite from scratch is coming soon, because while I did better this time, I still didn't do well.
My original content is still the land mines that I coded up. All the rest of this is just asset flips, mostly the Unity FPS Microgame. There is now only one cluster of landmines, around the sniper rifle. The grass is much more normal sized, so you can see through it. I remade the map in the spirit of the old map, but it is different now. The pistol still has a tremendous range. The Unity provided jetpack is in the level, but there are no clues as to where it is, and it isn't needed yet. Assume that in a version coming soon that the sniper rifle will be moved to the top of the construction skeleton, and the jetpack will be required to acquire the sniper rifle.
The final version playtested on my mac, so I'll reenable the macos version. The previous version worked on my mac at one point, but I never playtested the final version.
I added a quit button to the pause menu while in game, so you are no longer trapped in the game if you play it! And since you aren't trapped, it now plays full screen. It was windowed before because I had no way to exit it. You're still trapped in the game at the win screen and lose screen, but I'll fix that eventually. My plan is to just remove those screens completely. There is only one resolution, which is one step down from max resolution, mostly to prove that I could do that. Now that I can, I think I know how to make windowed or full-screen optional, and how to let the player select the resolution they want.
The linux version has some weird stutters for me at the start of the game. They don't happen in the Unity editor, just in the executable. I have no idea what they are being caused by.
Coming soon changes in my mind are making the skybox more interesting, making the pistol into a short range weapon, providing more of the weapons from the Unity FPS Microgame, and more interesting terrain and structures. I had planned to put a steam achievement in this version, but I gave up. I'll try later. As for what I actually do for the next version it is hard to say. I didn't think any of my plans for this version were overly ambitious until I attempted to implement them. Then it suddenly seemed like I was trying to swim up a waterfall. I need to take smaller steps here.
Lastly, at no point should anyone be nice to me about the quality of this game. I'm under no illusions about it. I want real critiques because I need to improve, not a participation award because you're afraid of hurting my feelings.