# UF2 download issues - Can't play my games!

**URL:** <https://forum.makecode.com/t/uf2-download-issues-cant-play-my-games/28805>\
**Category:** Help\
**Created:** [May 18, 2024, 10:53pm UTC](https://forum.makecode.com/t/uf2-download-issues-cant-play-my-games/28805 "2024-05-18T22:53:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RamseyJohnson](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/ramseyjohnson/32/13813_2.png) [@RamseyJohnson](https://forum.makecode.com/u/RamseyJohnson)\
**Post date:** [May 18, 2024, 10:53pm UTC](https://forum.makecode.com/t/uf2-download-issues-cant-play-my-games/28805/1 "2024-05-18T22:53:28Z")

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Hi,  
I am receiving this error code when trying to download UF2 to Retro Arcade for Education for the first time on page refresh:

Program Error: Invalid typed array length: -20

The following attempt to download claim for the file to be too big (by a relatively small number of bytes).

NB I am not using arrays in the games.

This is happening to games that previously had no problems downloading. I can’t play the games I could before on the handheld.

Here are 2 very small games with which I am experiencing this problem:

> **[Maths Test](https://arcade.makecode.com/S89837-53587-37360-61529)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.

> **[Space Voyage](https://arcade.makecode.com/S93586-15289-43067-99610)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.

As I can’t download the games at all, I can’t find a way to see the file size of the game. If I knew the size and limit, I could at least start to make sense of it, but as it stands I’m lost.

Please help.

Thanks,  
Ramsey

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<div class="post-metadata">

**Author:** ![danger\_kitty](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/danger_kitty/32/32006_2.png) [@danger\_kitty](https://forum.makecode.com/u/danger_kitty)\
**Post date:** [May 20, 2024, 1:24am UTC](https://forum.makecode.com/t/uf2-download-issues-cant-play-my-games/28805/2 "2024-05-20T01:24:54Z")

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Yeah I wish it was easier to see file size

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**Author:** ![javivibc](https://avatars.discourse-cdn.com/v4/letter/j/c67d28/32.png) [@javivibc](https://forum.makecode.com/u/javivibc)\
**Post date:** [November 29, 2024, 6:35am UTC](https://forum.makecode.com/t/uf2-download-issues-cant-play-my-games/28805/3 "2024-11-29T06:35:44Z")

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I had the same problem. I solved, maybe it can helps you, by reducing the name of the game and eliminating all the “backspace” in the name. Example “quest 3 de definitive adventure” to “quest3”