Safely guide your ambulances and rescue all the sickly patients in...

We've just released our first puzzle game and want to gather feedback on:

Puzzle Design

• How reasonable did you find the difficulty curve per section? Particularly mid-late game with our more advanced mechanics/puzzles.
• We introduce a new mechanic every 10-20 levels with an accompanying manual entry and several simpler tutorial levels to start.
• We roughly categorized levels as tutorial, applied knowledge, challenging and conceptual/fun. Which types of levels did you enjoy?
• Were there any particular pain points or levels that you found frustrating or ended up stuck on?

User Interface/User Experience

• We tried to provide useful time/sanity-saving features including fast forward, the ability to carryover demo progress and a mix of keyboard/UI shortcuts. Any ideas on features you would like to see in the future or with puzzle games in general?
• We tried to be liberal with how we supported players via tutorial levels, tips between earlier levels, a manual describing game mechanics and a hint system. Did any of these features resonate with you? Any ideas on improvements?
• Are achievements an engaging reason to play puzzle games?

Any general thoughts or experience supporting mobile with PuzzleScript/HTML. We tried to support this but ran into issues with:

• Screen size/resizing issues were pretty egregious and prevents the game from being played on most devices. 
• Differences in how mobile and pc handles click/touch inputs (mobile was performing inconsistently between devices).
• Issues with mobile specific controls like screen orientation, touch with small screens and inability to type and exit the game.

If we get consistent or particularly interesting/captivating feedback, we will consider implementing said feedback and updating the game in the coming weeks. Thanks, we appreciate your time!