The idea will be to try to find this old MS Basic compilers for OS/2 (MS Quickbasic?) and see if I can find some "brun30p.DLL", right?
The idea is correct. However, the DLL you are looking for is located in another package:
https://winworldpc.com/product/ibm-personal-computer-basic-compiler/-2. Specifically, on the floppy disk image: BasicISAMv1.0.
The program starts in a full-screen session and then waits for the input of a name. After that, it starts.
I tested it under a virtualized OS/2 2.1. The major problem, however, is the execution speed. The game is running so fast that it's impossible to operate the game. I have tested the program under VirtualBox, 86box and also under qemu.
If one could decrease the execution speed, it should be possible to play it.
I have attached the DLL here along with a screenshot of the program start.