Tip: Layer 3 backgrounds and tides disappear when you hit a message box, so plan your level around that. For example, you can add a sublevel without layer 3 at the start/midpoint, and include your message there.
This simple patch replaces the bonus stars at the course clear and gives you coins instead as seen in e.g. JUMP. In addition, you can disable to display bonus star on the status bar or the 1-up bonus if the time's last two digits are identical to the bonus stars due to the fact that the patch renders bonus stars useless.
The best thing is that you don't need any freespace at all.
Corrected two small oversights that created errors when reapplying the patch after disabling previously enabled optional features. Nothing else has been changed.
I don't much care for the bonus stars myself, and having something to get rid of them is handy on its own. Being able to re-purposes their code into something actually useful is all the better! Its simplicity is just a bonus, as far as I'm concerned.