This brought back some memories. As time goes by and games get more complicated I miss games that were simplistic but very fun like Ninja Cop and there were a lot of them.
These days when platformers or metroidvania games come out with modern graphics and sound I actually prefer those to the latest and greatest AAA games that are full 3-D and what not.
Thanks for bringing back my youth for a little bit with this post!
This particular Ninja Cop had a very high difficulty curve, however, nowadays you can always find good Indies games using old school techniques and graphics.