Thanks for bug reports, they are fixed in full version.
Watching people play I notice the deaths are usually caused by impatience/panic. There are some deliberate harder parts (acid bubbles/fire dance), but I also made one section much easier as it required precise egg jump timing (1st electric bolt).
Act 2 is probably harder, but you get health to make more mistakes with and if you game over you can restart from Act 2 with full amount of lives.
Also nobody seems to use the down control to fall through the skinny platforms
