Suggestion: display runtime version number on menu
Games exported with different w4 versions will inevitably include different runtime versions aswell.
By displaying a version number on bottom of the menu, it would be possible to check how updated/outdated a given version is.
Although not really a big deal, sometimes it happens that a game available on multiple platforms (e.g. the WASM-4 site and itch.io) may have a few differences between them (sound/performance), even when both games are essentially the same, with no "old versions".
Of course, it's up to the authors if they decide to re-export their games with an updated w4 or not, but when that's not the case, then players can look at the version and try looking for a newer one somewhere else.
For what it's worth, HTML bundles contain a line like this containing the version, eg:
<meta name="generator" content="WASM-4 2.5.1">