I played around with Pharo some time in 2017 or 2018, making a Minesweeper clone in it.

I really _really_ like environments where rapid and immediate iteration is possible, especially for any project with any artistry or exploration in its construction. One thing is that (in some cases) you see intermediate, emergent, or unintended results you'd not have seen otherwise.

Although not a particularly interesting unintended result, a logic problem (iirc) had the Minesweeper expand happen with each action (i.e. propagating cleared cells with each step rather than in an instant).