1. This has been done many times.
2. The colour scheme was horrible. The white is hard on the eyes. Mix that with neon blue and you have a tough game to read. The menu screen is difficult to see.
3. Keyboard controls are clunky. Not very precise when I tried it.
4. Easy. Beat all levels (easy, medium and hard) in under 10 minutes.
5. Automatically dying after hitting start is common and annoying.