Build Error about runty8 HOT 7 CLOSED

warning: associated function is never used: `fset_all`
  --> src/runtime/flags.rs:57:12
   |
57 |     pub fn fset_all(&mut self, sprite: usize, flags: u8) -> u8 {
   |            ^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: function is never used: `spr`
   --> src/editor.rs:824:4
    |
824 | fn spr<'a>(sprite: usize, x: i32, y: i32) -> impl Into<Element<'a, Msg>> {
    |    ^^^

warning: `runty8` (lib) generated 2 warnings
   Compiling runty8 v0.1.0 (/home/asterisks/projects/learn/Rust/github_project/runty8)
    Finished dev [unoptimized + debuginfo] target(s) in 14.60s
     Running `target/debug/confetti`
Couldn't create assets directory: ``.
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/bin/confetti.rs:5:48
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace