Kind of enjoyed the challenge and it was for the greater part pretty good. I did notice a couple of things that felt like bugs:
1. The processing times were sometimes really variable, like sometimes a wine would have a practically non-existent processing bar and once I had one that extended to about 1/3 of the screen. Kinda crazy and didn't feel intentional.
2. The value for the sans interest wine didn't always match what I got paid and was also extremely variable. Like from showing no price at all to showing over 7000 (the listed max is 6000). I know the one labeled as over 7000 paid over 7000, but several labeled in the hundreds paid several thousand as did the ones I got with no price. I kind of assumed that every bottle would be 6000 straight up.
Really wanted to try to get the wine with no listed price max but I wasn't able to afford it until I mad rushed to buy everything. I suspect I could have made it with the one wine that said "Quick, before it crashes", but I assume that crashes to next to nothing shortly after you reach the max (if not immediately). With how small and difficult to read the prices were I didn't want to risk it so I made most of my money off of Xander.
Overall, again, good game I had fun doing the challenge but didn't really feel compelled to play it beyond that (there is no long game). Also didn't see any point in trying the other times.. yes, I could have gotten the most expensive wine at the 20 minute version, but it just didn't feel worth it. One suggestion (other than fixing the bugs) is maybe give us a way to get rid of the processing bottleneck. I can understand being able to have more storage than processing but it is really kind of pointless to grow more grapes than you can process at any given time. Not that I really want you to cut back the growth so much as expand the processing.