# HELP! Code Disappears when I add Extension!
**URL:** https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534
**Category:** Help
**Created:** [April 21, 2026, 9:00pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534 "2026-04-21T21:00:02Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@RoboVacDev](https://forum.makecode.com/u/RoboVacDev)
#### Post date: [April 21, 2026, 9:00pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/1 "2026-04-21T21:00:02Z")
Please help!!! I was adding the extension jwunderl/arcade-sprite-utils and after it is finished installing half of the code disappears! Please help! I don’t know what to do next. I tried all the ways but nothing works. I need this extension for my game!
Here’s the game **after** I added the extension.
> **[real Bird Run: Football Renegade - Copy](https://arcade.makecode.com/S44358-92275-03203-06222)**
>
> uhh a game i guess
If you need, I also have the original game before the extension was added. It in this help topic.
> [@How to Make a Sprite Bounce off Another Sprite When in Contact?](https://forum.makecode.com/t/how-to-make-a-sprite-bounce-off-another-sprite-when-in-contact/43396):
>
> I’m making a football game for the game jam, and I want the football to, like, bounce off the other sprite that’s touching it. Does anyone know how to do this? Please answer! Thx
---
### Author:  [@VoxelMaster64](https://forum.makecode.com/u/VoxelMaster64)
#### Post date: [April 21, 2026, 9:54pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/2 "2026-04-21T21:54:04Z")
what from it do you want? depending on the block you may be able to add it to your code without adding the extension.
---
### Author:  [@Bilangus](https://forum.makecode.com/u/Bilangus)
#### Post date: [April 21, 2026, 10:28pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/3 "2026-04-21T22:28:19Z")
Whoops.
I think the blocks from the extensions incompatible with Sprite Utils got deleted. You can just use version history to rewind back if i’m not mistaken.
---
### Author:  [@AlexTheGoober63](https://forum.makecode.com/u/AlexTheGoober63)
#### Post date: [April 21, 2026, 11:50pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/4 "2026-04-21T23:50:11Z")
if the extension isn’t important, maybe stay away from using it… or, get a related extension that does the same thing from the og extension that deleted your code.
Wait…
Can people create extensions on Github that is secretly malware? Hopefully not, or else there would be pure chaos, I think github has moderators idk.
---
### Author:  [@VoxelMaster64](https://forum.makecode.com/u/VoxelMaster64)
#### Post date: [April 22, 2026, 12:02am UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/5 "2026-04-22T00:02:46Z")
you can’t make malware, I think the javascript is parsed by makecode arcade (@richard). it’s possible to make an exact replicate in like 3 seconds though
---
### Author:  [@richard](https://forum.makecode.com/u/richard)
#### Post date: [April 22, 2026, 3:42pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/6 "2026-04-22T15:42:05Z")
we don’t allow extensions to run pure javascript, everything goes through our compiler and so it is all pretty tightly sandboxed. we have a lot of other security precautions around user code as well; i’d be pretty impressed if anyone made an extension that could do anything that was actually harmful to your computer.
but people can write extensions that are buggy. this specific issue is being caused by a change @jwunderl and i made to a few of our extensions recently which has led to makecode inadvertently flagging them as incompatible even though they totally are. i still need to sort it out
---
### Author:  [@RoboVacDev](https://forum.makecode.com/u/RoboVacDev)
#### Post date: [April 22, 2026, 7:12pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/7 "2026-04-22T19:12:46Z")
Im trying to use it for sprite bouncing
---
### Author:  [@RoboVacDev](https://forum.makecode.com/u/RoboVacDev)
#### Post date: [April 22, 2026, 7:12pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/8 "2026-04-22T19:12:48Z")
That didnt work…
---
### Author:  [@javascriptnerd](https://forum.makecode.com/u/javascriptnerd)
#### Post date: [April 23, 2026, 2:07am UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/9 "2026-04-23T02:07:56Z")
with the extension [https://makecode.com/\_bsc1DDgxuWuU](https://makecode.com/_bsc1DDgxuWuU)
---
### Author:  [@RoboVacDev](https://forum.makecode.com/u/RoboVacDev)
#### Post date: [April 23, 2026, 5:00pm UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/10 "2026-04-23T17:00:48Z")
Half of the code tho, it isn’t there…
---
### Author:  [@RoboVacDev](https://forum.makecode.com/u/RoboVacDev)
#### Post date: [April 25, 2026, 4:43am UTC](https://forum.makecode.com/t/help-code-disappears-when-i-add-extension/43534/11 "2026-04-25T04:43:56Z")
@Bilangus I did that but then now the extension’s gone