Hi, congratulations on this enhancement of a classic. I loved Wizball and even finished it on my trusty 48K back then :-)
I noticed a couple of issues. First, the game does not work on the +2A/+3. It freezes upon loading. A quick look with a debugger under emulation shows a continuous loop between locations 50003 and 50033 (a JR NC instruction in the latter jumps back to the former).
In addition to that, the TAP file uses a non-standard loader instead of the common ROM one, and it is therefore unusable with memory card-based devices such as the DivIDE and DivMMC.
Could you please investigate into this? Thanks!