diff --git a/index.js b/index.js
index 1ff44de..0a84680 100644
--- a/index.js
+++ b/index.js
@@ -205,7 +205,7 @@ function tagABlock(gl, params, objects) {
     const ori = se3.inverse(se3.rotxyz(-camori[0], -camori[1], -camori[2]));
     const viewDirection = se3.apply(ori, dir).slice(0, 3);
 
-    const face = markBlock(params.world, params.camera.position, viewDirection);
+    const face = markBlock(params.world, params.camera.position, viewDirection, params.blockSelectDistance);
     if (face === undefined) {
         return;
     }
@@ -368,8 +368,7 @@ function castRay(world, origin, direction, maxDistance) {
     }
 }
 
-function markBlock(world, cameraPosition, direction) {
-    const maxDistance = 10;
+function markBlock(world, cameraPosition, direction, maxDistance) {
     const hit = castRay(world, cameraPosition, direction, maxDistance);
 
     if (hit === undefined) {
@@ -507,6 +506,7 @@ async function main() {
         keys: new Set(),
         lightDirection: [-0.2, -0.5, 0.4],
         ambiantLight: 0.7,
+        blockSelectDistance: 8,
         flying: false,
         isOnGround: false,
         world: makeWorld(),