I added this as a warmup: U5L5 Loops Explore Warmup Activity - Google Docs
It points to an older Angry Bird entry in hour of code.
Code.org - Classic Maze - it has 15+ puzzles.
It brings in loops around bubble 6 - and it has several kids of loops.
Best - it allows you to convert the code to JAVA script so they can make the transition easier.
My kids have all seen this - I bet them they already knew about loops - they saw this and knew they did. Please - add this in for virtual and distance learning. Please keep it in there period.