Found the new launcher (I guess it is electron based) here: https://totemarts.games/forums/topic/79582-introducing-the-totem-arts-launcher/
Tried it under arch:
Does install, but does launch with a JavaScript error.
Running it through wine console fixes that error and shows the following output with a black (loading/splash?) screen:
[264:1213/204313.750:ERROR:network_change_notifier_win.cc(224)] WSALookupService
Begin failed with: 0
20:43:14.304 > Application ready
[384:1213/204314.465:ERROR:network_change_notifier_win.cc(224)] WSALookupService
Begin failed with: 0
20:43:14.961 > Checking for update
20:43:15.705 > Update for version 1.0.12 is not available (latest v
ersion: 1.0.12, downgrade is disallowed).
20:43:15.714 > Loading games from https://launcher.totemarts.servic
es/games.json
20:43:15.716 > onBeforeSendHeaders hook in main allowing launcher.to
temarts.services
20:43:16.331 > 1 Games Loaded!
20:43:16.348 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
20:43:16.887 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
20:43:17.291 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
20:43:17.696 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
20:43:18.272 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
20:43:18.273 > onBeforeSendHeaders hook in main allowing totemarts.g
ames
FYI