Thanks Retrospect. It's a lot of fun doing these games! I enjoy writing these games on the bus and train to and from work.
so ... it looks like I may have messed up with the collision detection a bit and that is why level 5 is too difficult.
These adjustments to the code below seem to fix the problem:
Change line 1410 to:
1410 IF SET=11 THEN 1420 ELSE 1500
Change lines 1940 and 1950 to:
And delete lines 1960, 1970, 1980 and 1990
I think that should do it.
I may try adding some new mystery targets into the higher levels that occasionally pop up where extra points can be scored.