Your point was that a chemical reaction, presumably gas creating, occurs besides the already established effect. The paper you linked just mentions that some dissolved compounds can lower the surface tension which can promote bubble forming. This is not a chemical reaction and the distinction is important.

It’s already a feature

Bottom 2 arrows when in the comment section

As far as I know, no one ever says “I sleep at 2100 hrs (twenty-one hundred hours)”. We say “I sleep at 9 o’clock” or “at 21 o’clock”). Then of course change o’clock with your lagnuage’s equivalent such as “uur” or “Uhr” in Dutch and German for example. Pm or am is almost always derived from context, and if it’s not you can add “in the morning/afternoon/evening”.

I don’t really want to spoil too much, but try to invest the coins you get into powerups and try going for relics in the stages (follow green arrow in stages with !). The unlocks screen also has good pointers for what to do next.

Don’t worry about dying quickly if you’re only just started, it’s all part of the game.

It won’t kill the full 20 hours, but 2 great mobile games that I like without the gambling bullshit: Vampire Survivors and Siralim Ultimate. The first one is free, so just try it. The second one is a monster training RPG where you can make sick combos and synergies.

The difference is that Valve is privately owned. They don’t have to please a board of shareholders who want to see the platform milked for the slightest increase in profit margins.