Very nice chords! They occupy the perfect spot between complexity and simplicity. The progression feels dreamy, and there are some very pleasant undertones of nostalgia. The whole song has a blissful, almost optimistic feel to it. The lofi music I listen to tends to have more melancholy feelings, so this song feels refreshing in comparison. Great use of chiptune synths as well.
Great use of lo-fi elements like record crackle and bitcrush filters. The saxophone and guitar solos are a very nice break in the song. They are mixed a little on the louder side but they do not steal attention away from the other parts of your song. I like the percussion a lot, it has some swing and some punch to it without feeling oppressive.
I feel like your chord and your lead synths are a little too bright for what is meant to be a relaxing lo-fi song. Using a low-pass filter or an EQ to cut some of the higher frequencies on your synths could help them blend in better without getting lost in the mix.
Very nice song overall. Tell your dad he is great on guitar!