Show HN: Mini Metroidvania in 13KB of JavaScript

Re:Show HN: Mini Metroidvania in 13KB of JavaScript by johnfn on Tuesday September 13, 2022 @06:11PM (#32830838)

If it's really 13kb, how can there be a loading screen?!? Checkmate!

In seriousness though, this is awesome! I love little metroidvanias. :) And the interactions, like the jump and swipe, feel remarkably satisfying. Great stuff.

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by arikgalactic on Tuesday September 13, 2022 @07:03PM (#32831267)

1. The WebAudio api requires user interaction to allow playing audio. The main menu saying "press any key" is intended to trigger that. 2. One WebAudio is ready to use, I build all the sound effects procedurally. There's 13 SFX and 3.5 minutes of music that need to be generated! This takes about 5-6 seconds total to churn through all the math used to build the audio buffers.

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by Narishma on Tuesday September 13, 2022 @08:17PM (#32831784)

Why aren't they generated while waiting for the player to press a key?

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by lioeters on Tuesday September 13, 2022 @11:06PM (#32832850)

I'm guessing it's because WebAudio won't let you create audio buffers until a user gesture like a click allows audio context to be started ("resumed").

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by nonethewiser on Tuesday September 13, 2022 @06:26PM (#32830964)

But seriously, why is that?

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by solumunus on Wednesday September 14, 2022 @05:09AM (#32834809)

I assume the code is 13kb but loads external assets like image/audio.

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Re:Show HN: Mini Metroidvania in 13KB of JavaScript by filleduchaos on Wednesday September 14, 2022 @05:37AM (#32834971)

That is not permitted in JS13K, no.

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