I see. I stripped some portal surfaces off the far wall which should fix that. As for the true solution, you are VERY close. 1) Don't forget you can climb on top of the block. 2) You don't have to pass a light bridge through the bottom of a portal.

There's a trick when you're able to place hard light portals where you can just sort of 'crawl' them up a wall and pull yourself with them. It was slightly trickier here, with the limited time and the overhang, but not impossible. I tried putting the hard light through the ramp but that definitely didn't work, it didn't go high enough up.

You don't need a fling to get to the door. There's another way. But if you did it without getting the panel moving, then you did break it. :) I thought I prevented that... guess I'll have to look it over.

*from the ramp the laser raises up

I'm not really sure I solved this exactly the way I was supposed to. The rooms with the laser and mirror cube seemed to be unnecessary, since you can just use the hard light bridge to pull yourself up to the exit's level, and catapulting up from the laser opens up would clearly require momentum that you can't get from anywhere accessible at that point.

I really liked Heartbeat's mechanic, so I borrowed it to power this puzzle. Be sure to try it out: http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=71495919