It's a nice game! Easy in the beginning but super hard in the end.
Side note: with an older version of emacs (27.1 ) the vendored copy of xelb didn't work:
No applicable method: xcb:-+request, nil, #s(xcb:DestroyWindow t 4 1 nil)
After changing the path in launch.sh to the xelb installed from elpa the game worked, but I got a bug - images were somehow corrupted:
P.S. Also, it seems that xcb-boomshine.el file doesn't correspond to its compiled version. For example there is no xcb-boomshine-new-game function defined :/