If you have a Windows device with a touchscreen, you can at least to some extent use NeoLemmix on it. This presumably extends to Linux + Wine. Of course, NeoLemmix's UI is not optimized for touch, but one could hypothetically create a fork with different UI that is designed for it (to be clear, this is not something I would consider doing). Porting NL to web would not be possible without a full rewrite from scratch, but - while more of a task than I'm willing to consider taking on - a port to usually-touchscreen OSes as an offline app, in particular Android, is probably more viable.
(Likewise for Loap. And most likely for Lix, too.)