diff --git a/book/games/pong/Cargo.toml b/book/games/pong/Cargo.toml
index 4a012d50..ee389321 100644
--- a/book/games/pong/Cargo.toml
+++ b/book/games/pong/Cargo.toml
@@ -9,6 +9,11 @@ edition = "2018"
 [dependencies]
 agb = { version = "0.10.0", path = "../../../agb" }
 
+[profile.dev]
+opt-level = 2
+debug = true
+
 [profile.release]
 panic = "abort"
-lto = true
\ No newline at end of file
+lto = true
+debug = true