I'm a big fan of these games. Nice introduction to the different concepts and then nice mix of them in the levels to produce tricky but not impossible levels.
Fun game, some of the levels required a lot of thought but managed to muddle through them all. Didn't think the timing needed for jumping was that exact, but then I grew up with pixel perfect jumping required on the ZX Spectrum.
Hello. I made an update. Normally it's working now.