Free:
Hana no puzzle 1&2 (same vein as Jelly no puzzle)
Teleportower Plus (short, refreshing)
NAWNCO (browser-based, very short, flash has become obsolete and might not work on most browsers)
Illiteracy (browser-based, very short, by Le Slo)
Not free:
Into the Breach (by the creators of FTL)
The Bridge
Mushroom 11
Free:
Hana no puzzle 1&2 (same vein as Jelly no puzzle)
Teleportower Plus (short, refreshing)
NAWNCO (browser-based, very short, flash has become obsolete and might not work on most browsers)
Illiteracy (browser-based, very short, by Le Slo)
Not free:
Into the Breach (by the creators of FTL)
The Bridge
Mushroom 11