Warp Tunnel
This game is from ldjam.com, which is currently unavailable.
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You can try viewing the original page on Web Archive (may not load correctly).
A space shooter where, not only are there enough bullets to constrain your movement, but the screen shrinks horizontally as you make hyperspace jumps to reach your final destination -- the alien "primary hive," i.e. a factory responsible for the many ships that you fight.