These are going to be quick reviews since all but one of the games was a quick play. That's not a value judgement - it's just that I feel a bit silly putting individual reviews in.

The first two were ≤ 5 and the second two > 5 in my votes.

( Sleuth, by Scott Greig (Quest) )
( The Egg and the Newbie, by Robert DeFord (Glulx) )
( The Rocket Man from the Sea, by Janos Honkonen (Z-code) )
( The White Bull, by Jim Aikin (TADS 3) )