with the source Code package: hwmrust-code.zip I have some issues.

cd /home/user1/rust/code/FlappyIntro/flappy_dragon_base

$ cargo check
error: failed to load manifest for workspace member /home/user1/rust/code/MarsScore/mars_base_one
referenced by workspace at /home/user1/rust/code/Cargo.toml
Caused by:
failed to read /home/user1/rust/code/MarsScore/mars_base_one/Cargo.toml
Caused by:
No such file or directory (os error 2)

cd /home/user1/rust/code
$ cargo check
error: failed to load manifest for workspace member /home/user1/rust/code/MarsScore/mars_base_one
referenced by workspace at /home/user1/rust/code/Cargo.toml
Caused by:
failed to read /home/user1/rust/code/MarsScore/mars_base_one/Cargo.toml
Caused by:
No such file or directory (os error 2)

~/rust/code$ ls -la
total 248
drwxr-xr-x 30 user1 user1 4096 Jul 29 20:16 .
drwxr-xr-x 56 user1 user1 4096 Sep 16 21:34 …
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 BootstrapBevy
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 BootstrapRust
drwxr-xr-x 2 user1 user1 4096 Jul 29 20:16 .cargo
-rw-r–r-- 1 user1 user1 118160 Jul 29 20:16 Cargo.lock
-rw-r–r-- 1 user1 user1 2022 Jul 29 20:16 Cargo.toml
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FirstLibraryBenchmark
drwxr-xr-x 5 user1 user1 4096 Jul 29 20:16 FirstLibraryCreate
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FirstLibraryDocs
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FirstLibraryGenericRange
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FirstLibraryGenericType
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FirstLibraryMutableRandom
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FirstLibraryMutableRandomPlugin
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FirstLibrarySharedRandom
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FirstLibrarySubstitute
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyAnimation
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyAssets
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyAssetsLoadingMenu
drwxr-xr-x 7 user1 user1 4096 Jul 29 20:16 FlappyCollision
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 FlappyIntro
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyPhysics
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyStatesGeneric
drwxr-xr-x 5 user1 user1 4096 Jul 29 20:16 FlappyStatesMacro
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyStatesMenu
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 FlappyWrap
-rw-r–r-- 1 user1 user1 43 Jul 29 20:16 formathook.cmd
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 MarsBaseOneOptimize
drwxr-xr-x 5 user1 user1 4096 Jul 29 20:16 MarsBaseOneSkeleton
drwxr-xr-x 4 user1 user1 4096 Jul 29 20:16 MarsBaseOneWorldBuilder
drwxr-xr-x 3 user1 user1 4096 Jul 29 20:16 MarsElements
drwxr-xr-x 13 user1 user1 4096 Jul 29 20:16 OLD_CODE
-rw-r–r-- 1 user1 user1 32 Jul 29 20:16 rustfmt.toml
drwxr-xr-x 2 user1 user1 4096 Jul 29 20:16 src

the Directory: MarsScore did not exists in the ZIP File