I wish I had a Playdate now! I have fond memories of this game from Your Sinclair - written by Whistlin' Rick "Davey Boy" Wilson himself. I was listening to his song "Hold My Hand Very Tightly (Very Tightly)" this morning too!
Viewing post in Advanced Lawnmower Simulator: Playdate Edition comments
You can probably play the game through the Simulator in the Playdate SDK if you want to go get that grass without hardware :)
I didn't have a Speccy back in the day, but I loved Duncan MacDonald's writing in PC Zone as Mr Cursor & discovered his earlier YS work & ALS retrospectively through this. I think he would've loved the quirkiness of the Playdate. Boing!