Venture deep into the Cavern of Longing. Plunge your sword deep into the dragon's heart! How deep is your resolve? Post your best times in the comments!

  • Feel the weight of a giant sword!
  • Move in ways you never thought possible.
  • Overcome your deepest struggles.

Created in 72 hours for Ludum Dare 48 Jam. The theme was "deeper and deeper". 

Join the Deepest Sword Discord!

If you’re speedrunning, submit a time on!

Note: The game may take a moment to load. If the game does not load you may have to enable WebGL on your browser.


  • Move - A and D
  • Sword - Mouse buttons or left and right arrows
  • Respawn - R
  • Full reset - 0 (zero)

** You can rebind your controls in the pause menu!


Developed by Cosmic Adventure Squad (@squad_cosmic) Support us on Ko-Fi (



  • v0.1.2
    • Jam submission
  • v0.1.3b
    • Fixed crash when spamming return to checkpoint
    • Added PC and Mac downloadable builds!
  • v0.1.3c
    • Added button to quickly fully reset the game for speed runners!
      • Press 0 to do a quick full reset without refreshing your browser.
  • v0.1.4
    • Added a pause menu where you can rebind keys and change other settings
      • You can now enable milliseconds display for speed running!
  • v0.1.4c
    • Added new options for our speed running community!
      • Added lap display and total time toggle for the x10 format.
      • Added starting stage selector to make it easier to practice.
  • v0.1.5
    • Updated menu UI! Better organization and credits page.
  • v0.1.5c
    • Added best time display on completion screen and Ko-fi link on Credits page. Buy us a coffee :D (if you want...)



Download NowName your own price

Click download now to get access to the following files: 23 MB 20 MB 33 MB

Development log


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Viewing most recent comments 1 to 40 of 545 · Next page · Last page

not even subtle...

(1 edit)

Took me 31 minutes good game 9 / 10 would give it 10 / 10 if it had like another boss or new content but it really is a good game good jop

Loved this mechanic of this game, totally didn't have anything to do with shoving a massive sword into a satisfied dragon...

Ye uuuuhhh...10 outta 10 and simply one of the best games i have ever played.

I did it in fifteen minutes second try i wish I could upload image but I didn't take a screenshot :c

im stuck

it took me 67 minutes... I hated every second of it but it's a good game 

Nice game, but i ran into a bug. At the forth time the blade got stuck in a corner and I couldn't move either with A and D nor the arrows.

r to reset

took me 26 and a half mins XD amazing

This game is really good I love it

Really fun and interesting game. Keep up the great work! 

i got softlocked at the 4th leagth lol


it was quite a struggle having such a LARGE sword, but finishing was so satisfying, 10/10 would cum again


Such a fun game! still can't get past the very last part.

I tried this game. Made a video and I liked it but... that last part got me a bit to angry. I admit that.


new time baby


i beat in 40 minutes :)

i´m feel Happy

I loved the unusual way of the character to get through obstacles, I was used to pressing the space bar to jump but this was surprising. I also absolutely love the visuals and no way that took 72 hours to make! Great game! 

Hilarious project and cute art style! Are there any recommendations on lvl 3?


I rage quit but this game is still a 10/10

new best time

hated playing it. But the game is good

Fun game!


First finish, not bad

Second finish, a lot of improvement


im feel sad now


8 bit getting over it

ahhhhh this is so frustrating 

This is great and very tricky at the same time! Glad my first try beating this game still in sub-50 mins lul

my best time



The amount of "that's what she said" material



Finally 3 minutes



Average Session : a few minutes

Are you sure about that?

My first attempt

My second attempt

My third attempt


whoever designed this game belongs in hell. Made me rage so hard. 9/10. good job.

That last level was brutal.

New best!!!!! :DDD


Best timeeee!!!!!

it took me an hour :)

it is because you are on mobile and mobile is not for type game

ohhh well that explains it




GG bois!!

Viewing most recent comments 1 to 40 of 545 · Next page · Last page