The game is cool. Especially the music is cool. Only it is not clear why on the game page it is written that in the web version there is no music, because it is there. Also, if you stop completely, you will not be able to continue the descent and you will have to reload the game page.
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Good catch on that energy bug, patch is out to the web-game now!
The comment on sound effects has to do the the secondary sound engine in the game.
There is custom system that worked great on windows, but when I started testing the web assembly version of the game it broke.
It adds dynamic sounds for breaking, turning, and wind.