Somebody should correct me if I'm wrong, but is that really it? Two new scenes, only one of which even has CG, two fights, and that's it? That seems paltry for two months of work. On top of that it's buggy as all hell. 
1) When doing the bar fight, which came out in the last update, I sometimes get stuck with my combat UI vanishing, leaving me unable to do anything except load. This usually happened when trying to move during combat. This scene was bugged on 4.0's release as well, and for it to still be borked an entire update later is pretty bad. It took 3 tries to complete the sequence, and the bug was encountered in both Jewel's training sequence as well as the bar fight itself.
2) If you lose the second fight in Horizon, upon reload you'll spawn with Jewel but no enemies will spawn, and the combat UI doesn't appear, meaning you're stuck and have to reload.
3) If you reload a save, whether auto or manual, that was made in Horizon, you spawn in the first combat room outside of combat. Enemies are there, but there's nothing to do except walk around, meaning you have to reload. I tried loading a save I made in the tentacle room, and it still spawned me there.
4) Occasionally during any event where a CG appears and the background is blurred, the game will get stuck, and the only way to make the text appear to continue the scene is to press TAB.
5) Karen's scene wasn't unlocked in the gallery after completing Horizon.
These bugs were encountered in the 64-bit windows downloaded version.
I understand that it's a work in progress, but I'm still alarmed at just how buggy this is. Every bug I listed here is not just easy to recreate, it's almost impossible to avoid them with the exception of the first one. All of these bugs were encountered, in some cases multiple times each, in just under one hour of playtime since I made a new save for this update. On top of that the entirety of Horizon, even when reading every line of text, only took me about 20 minutes to complete, the overwhelming majority of which was spent in combat. Two months of development for 20 minutes of content doesn't feel right.
I've been a $5 patron since the month that 0.3 launched, meaning I've put $20 into this game and in return received what I would consider the two worst updates since the project began. 0.4 was a mess even after multiple hotfixes with almost nothing in terms of actual H content, and 0.5 continued this trend. This seems wrong for a game with nearly $3000 in monthly funding on Patreon, 2 months of time and a 4-man development team.
I'm cancelling my patronage until these updates become more substantial or increase in quality, and I'm sad that it's come to this. I enjoyed every update to 0.3 and this is the only game out of the dozen or so that I follow that's received any money from me, but I regret it now. This doesn't feel like version 0.5, it feels like version 0.05. Hopefully things improve from here and I'm inclined to re-up my patronage, I'd hate to see YET ANOTHER promising H-RPG go down the shitter. It's becoming too much of a trend.