Great TAS for a terrible game :D There is a small improvement that can be done that I discovered while playing this game casually (it's also detailed in the manual) - In Stage 4, Room #5, you have to lure a spike ball up to the top of the screen and use it to activate a switch. The TAS uses the platform on the left side of the screen to ride up to the top, but you can instead use Alfred's dive bomb maneuver to bounce off the spike ball, and it will continually follow you upwards while you're bouncing on it.
Here is a screenshot of the room in question:
https://imgur.com/jiVsLeC
Here is a short twitch clip of the technique
https://clips.twitch.tv/DiligentCuriousOrangeBIRB-2dLQVZWlMdyEA8fh
By my rough estimate, bouncing on the spike ball should be about 1-2 seconds faster.
Note that I don't plan on implementing this improvement, but thought I'd share in case anyone ever decided to have another go at this game.