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Cart #tidx-4 | 2020-11-22 | Code ▽ | Embed ▽ | No License

Version 1.1 - Reworked code and squeezed in invader animation

This is a port of the original arcade Space Invaders in just over half a kilobyte. I was planning to submit this for TweetTweetJam 5, but shrinking it down to fit into the size limit proved pretty tricky. The invaders all look the same, there's no UFO that intermittently heads across the screen, and I had to rethink the lives system a little bit, but all the other major elements are there, and I think it plays decently well.


  • Score system
  • Level Progression
  • Enemy Animation
  • Enemy Fire
  • Destructible barriers
  • Increasing invader speed and fire rate as number destroyed increases
  • Damage system (your laser cannon changes colors after taking a hit, and will be destroyed after 3)


L/R----Move laser cannon

P#84441 2020-11-18 18:23 ( Edited 2020-11-22 11:12)

:: Mot

I was impressed even without the destructible shields.
Any chance of a write-up on how it actually works?

P#84479 2020-11-19 10:28

Thanks, had to think outside the box to get that working. I can do a writeup for that, I've been thinking about doing that for some of my tweetcart games anyway, but wasn't sure if people were interested.

The basic idea is that it's using a combination of print() and pget() as a kind of interactive decal system.

P#84485 2020-11-19 15:29 ( Edited 2020-11-20 02:32)

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