oh just noticed the NextBasic 2.06 message
Viewing post in SPACE SPLAT (ZX Spectrum Next) comments
Yep, that's something that I might spend some of my break time to find and fix. It was caused by a bug that got fixed in a later version of NextBASIC that then broke the way the game worked.
It's probably the one game that won't work properly out of all the games - with KS2 and NextBASIC updated, I'll need to see if I can fix that one... :)