diff --git a/examples/tehtriz.p8 b/examples/tehtriz.p8
index d6ff85454..2e100c34a 100644
--- a/examples/tehtriz.p8
+++ b/examples/tehtriz.p8
@@ -7,6 +7,12 @@
 ;   staged speed increase
 ;   some simple sound effects
 
+
+
+;  TODO fix crash when piece reaches bottom.
+;  TODO fix wrong behavior when compiled without optimizations.
+
+
 main {
 
     const ubyte boardOffsetX = 14