Great game! Found two issues: 1. When you press Run/Stop in the intro you get a CPU-Jam. 2. If you press "Space" in the in-game manual you also get a CPU-Jam. Tested on Vice3.6.1 with Dolphindos 2.0. With standard kernel all is fine.
I am not schooled enough to talk about this but it is not the first time that someone with a fpga and dolphindos sayes that something is not working. Most times it helped for them to change to stock kernal etc as it seems that fpga is not automatically perfect. Just my two cents