I'm sure you have the parallax rate right, but do you have scale on your UI layer set to 0?

At 3000x2000, I really would t be too worried for desktop. I have much larger with tons more going on than you are describing and my 7-year-old PC can handle it fine.

I'm moving my parents to their new home tomorrow and chaperoning a regional church dance on Saturday. Welp, this LD won't be my entrance to the compos, either.

Yes. There is an Audio property for playback time. You can reference it with Audio.PlaybackTime("Whatever") and then you can alter it with Audio > Seek To.

It's a little tough to make it perfect, though. There are a few ways I've gotten around it, though.

Firstly, you'll need to say if Audio.PlaybackTime("Whatever") is > or = to ~~~, Seek To ---. This is the quick and dirty and accounts for if it happens to be off by a millisecond or several when the processing tick goes by. You can also reference on track ended, but this is unreliable in my experience (it works, just introduces gaps).

You can also play the same track over itself once it ends by alternating tags. Ie if Audio.Audio.PlaybackTime("Whatever1") >= to ~~~, play with tag "Whatever2". And then alternate events. This way, you can retain the audio spill-over at the end of the measure without wrapping it to the start of the track (or the mid-point wherever you are going with it). It isn't an ideal solution, but it works.

Or you could do the whole things split up by measures on a timer and make it fully interactive...

This is a great addition! There are plenty of examples I've made for people on how to achieve different things, and this would be a neat way to share them.

Dropbox, google drive. Either one will do. Since you haven't been here long, you'll likely have to post just the URL without http or www instead of a link. Links are enabled once you get more rep points.

This isn't the type of thing I would typically post here, and hopefully people recognize me as an active part of the community. But my mom's cancer has come back and worse than it was just a few months ago. Her debt is enormous and will be growing even more very soon.

Please help contribute to my mom's healthcare--she can't qualify for nearly any other kind of aid despite not even being able to afford her current medical bills.

Give Forward campaign.

Any donation, share, or kind thoughts will go a long way toward helping. I sincerely thank you!

You don't, you make your art assets seamless in your art program by drawing carefully and adjusting accordingly.

And you can round pixels by using a grid of 1px by 1px or greater. You should turn this on when you start any layout.

You just need to make your tiles appropriately to hide your seams--this is how it is almost always done. Heck, I have to turn off the 1px thing in the 9patch plugin (change it to exact) because I make my tiles to work from the get-go. The 1px overlap actually makes it look worse in some cases.

Note if you have two sounds both normalised to 0 dBFS and play them both simultaneously, there is a high chance of clipping distortion, and the chance increases the more sounds you layer on. This is a normal result in digital audio. Some systems have built in compressors or limiters to avoid this, but if not you can avoid it by playing back (or mastering sounds at) a lower volume, e.g. -6 dB.

What the OP is describing really sounds like this (clipping) rather than the computer's inability to process it all. It is a common mistake when people start out with audio. I haven't played with it, but I believe C2 has an audio analyzer. If it does, have a text object show what your maximum volume output is (it is measured in decibels). If it ever exceeds 0db, it is clipping. I generally try to limit audio output to -2db, but it is up to you.

A lot of it is just strong focus and not being afraid to change your plans. I have a lot of stuff written/drawn out on paper, though. I also have made a private wiki for my game for reference (it's an RPG, so it isn't really small).

This new trailer makes for a really nice improvement over the earlier versions of the game! Great job reworking it! Is the music final, placeholder, or stuff you've made?