I and my other half (both of us are 27, but he's older by a few months. He's Japanese and I'm English) have been together for 2 and a half years. Everything has been fine, he's usually sweet and loving. Recently, he did get very stressed whilst moving house and job (he was working long hours (leaving at 5:30 in the morning and not getting home until 23:00) but he got his new house and started his new job just under a month ago. He seems to have settled in well with no problems.

Then last night, we decided to have a date night together (we're currently long distance, so it's just past lunchtime for me), and we decided to play Minecraft together.

For context: I am a gamer, but I've not played Minecraft before (I usually play platformers or fighting games such as Street Fighter). I did briefly play Minecraft with him a couple of weeks before, but due to all the new and unfamiliar words (Japanese isn't my first language, but I can hold a conversation without issues, but the game had many words I've not used before (such as the word for tools and stones types)). I did try studying Minecraft, but I also had a cousin pass away unexpectedly during that time and had to finish writing a report at the same time, so those had to take priority.

When we got to playing Minecraft, he seemed to be unusually impatient and got quickly frustrated and angry (because I kept getting the wrong material because he was talking unusually fast).He doesn't yell, but he kinda has a strict "growl" to his voice when he gets angry. He then said in anger "you (me) cannot speak Japanese" (he said this in English and he rarely speaks English) and that comment had me in tears. Took him a few minutes to notice (I don't know if it's my microphone, I use an old turtle beach headset), that I was crying. We played for a few more minutes then we stopped playing.

I then told him why I was upset and he was a bit defensive and then apologised. He then got upset and agreed that he took the game too seriously. Then he said "maybe I'm not right for you" and started crying (this came out of the blue) and then had a panic attack (he does suffer from them). We then comforted each other.

What I'd like to ask is that I was wondering what could've made him take a game meant to be calm and relaxing (it has relaxing asmr music in the background) could cause such a stressful reaction. It's unlike him to play a game and then get this frustrated and upset. Even when I'm having "bilingual errors", he doesn't usually get this angry or upset. Or was it me being a jerk for not understanding the game well enough and not taking the game seriously enough. (I usually play games to have fun, even when I'm in game tournaments, I usually play to have fun and don't care too much about the prizes or winning).

Any advice?