This has potential, the atmosphere is great! You really feel completely isolated in a faraway, hostile place. Having to tetris your components together is fun as well. It needs a bit more general polish though, and maybe a faster submarine? Getting to the next pickup took a bit too long.
Also, "I have noticed that sometimes Web GL build suddenly closes the page" - I'd think it's because the game uses both W and Ctrl as inputs, and Ctrl+W closes the current tab.