Web Cannon

Verified against the spelunky.ai port v0.1.10 on 27 October 2026.

Each shot is a ball of web that turns into a web where it lands, on a wall, on the floor or on a monster, and a web holds every monster in it still, all but Spiders and Giant Spiders. It does no damage, and the webs it makes fade away. Weapon Shops and Rare Shops sell it, and Crates and buried blocks give it away.

The Web Cannon is picked up like any item, crouching over it and pressing the attack key. While it's held, the attack key fires it, on the ground, in the air, hanging or climbing; crouching, the key puts it down in front of the player instead ^[3]. It isn't thrown. A shot fires one web ball from 12 pixels in front of the player at 6–8 pixels per step, plus the player's, never slower than 6 forward, knocks him 1 pixel a step back and 1 up unless he's hanging or climbing, and starts a wait of 20 steps before the next ^[4].

The ball falls as it flies, 0.2 pixels a step faster each step, up to 6 ^[5]. It stops on the first block, water, item, web or monster it touches (but a Giant Spider), or when its life of 20 to 100 steps runs out, and spins out into a web there ^{[6] [7] [8] [9]}. A web it makes fades out, and is gone 550 steps (about 18 seconds) after it appears ^{[10] [11]}.

In the clip, the player fires along the floor, and the ball makes a web a few blocks ahead. A Caveman spots him and charges into it, and stops dead ^[12].

The Web Cannon goes with the player through a level's exit if he's holding it, and is in his hands on the next level ^{[13] [14]}. He drops it when he's stunned, or when he teeters too long at a ledge's edge ^{[15] [16]}.

None: neither the ball nor the web hurts anything. A web holds what's in it instead, on every step:

A shop stocks one only if the level hasn't got one already ^[27], and it adds 10% of the base price for each level past the second ^[28]. Shops are made from level 2 on ^[29], and level 16, Olmec's Lair, has none:

Every block of rock away from the level's edges that isn't gold and holds no gem has a 1 in 1200 chance of hiding an item, one of nineteen at random ^{[30] [26]}. In custom levels, it's the level editor's tile W ^[31].

Paying for one, or carrying one out of a shop without paying, which angers the Shopkeeper, shows "YOU GOT A WEB CANNON!", and it stays in the player's hands ^{[32] [33] [34]}.

• The Machete cuts its webs, as it does any web ^[35].
• Water washes a web away, and a ball that touches water makes its web there ^{[36] [37]}.
• Giant Spiders. A ball goes through a Giant Spider rather than stopping on it, and webs don't hold either kind of spider ^[38].

• A web shot ahead along the floor, as in the clip, stops a charging Caveman before it reaches the player.
• The player's own webs hold him too, so it's better to fire them away from where he means to go.

• The webs a level starts with never fade; only the Web Cannon's do, as its ball marks the web it makes as dying ^{[39] [40]}.
• The shot fires its single ball from a loop that runs once, for (i = 0; i < 1; i += 1), and plays the Shotgun's sound ^[41].