YARS - shoot 'em up extreme!

Vertically scrolling shoot 'em up, with explosive overkill! Good for blowing off steam.

Based on a simple HTML5 game I made in 2018:
https://helderman.github.io/yars/
Actually, the original game was just the side-effect of a presentation I did about writing games for fun:
https://youtu.be/5V0jklDVT2g

For the explosions, I am using the same 'fisheye' trick I explored in the 'Explosion' project I made earlier this year:
https://scratch.mit.edu/projects/389171074/

All graphics created either with Scratch's costume editor (text, digits, buttons, power-ups) or with GIMP (ships, bullets, title, starry background).
https://www.gimp.org/

Scratch Cat, Giga, Gobo, Nano, Pico, Tera taken from Scratch's image library.

"Magic Spell" sound effect taken from Scratch's audio library. Voice-over (power-ups) by me; post-processed with Scratch's sound editor. All other sound effects (shooting, explosions) created with SoX.
http://sox.sourceforge.net/

Music: "Sci Fi" by Benjamin Tissot (a.k.a. Bensound)
https://www.bensound.com/royalty-free-music/track/sci-fi
License: free license with attribution.
https://www.bensound.com/licensing
Note: the license does NOT allow you to modify the track.

Title font: "Ink Free", designed by Steve Matteson. Copyright © 2005-2018 Ascender Corporation.
https://docs.microsoft.com/nl-nl/typography/font-list/ink-free

BUGS:
Sometimes, it seems not all invaders are disposed after 'game over'. Lone invaders wander around at the title screen or at the start of the next game session.
The exhaust is often not correctly restored to its original size when power-up 'flamethrower' is cancelled.

WORLD RECORD: 31240 by RokCoder.