His style is a little overly wordy for some, but if you like sci fi you should try out Marooned on Giri Minor
. And then if you enjoy it, look up the much, much larger sequel Secret of Grass Planet.
There aren't a huge number of popular puzzle games here, but the inventory and variable system would definitely allow more exploration of that kind of thing by any interested authors. You might like Inepta Academy, or Ruins of Anzar (which should be rated higher than it is imo).
Also in that category are Cows vs Aliens, Koi Koi, and Delve, where Berka and Killa broke the editor over their knee and made card games and a roguelike.