I've mentioned a couple of times on Discord that I was working on a Commander Keen fangame.
I've now released it. It's based on Keens 4-6 and is a bit more like "level pack on a custom engine with some customized game features" (hm, where have we heard that before? :P ) than a full-on fangame.
More info over at the Public Commander Keen Forum: https://pckf.com/viewtopic.php?t=17958
Download link: https://nv.wtf/GalaxyReimagined_1.0.3.0.zip
Forgot to mention here, but I've released a couple of updates to this. The latest version is V1.0.3.0. Several fixes (and difficulty tweaks, especially on Easy mode) since the first version, it also now is open-sourced, has a Help file, and has support for custom content (although unlike NL, this isn't particularly likely to get such content - but the support is there). Save files from earlier versions will work with the new version.
Nice! I'll give this a proper look sometime soon and post some feedback :thumbsup: