Such a short map
Layout is rather bland, lots of straight lines, but I couldn't see anything technically wrong.
[NIHON]
Same as Italia, nothing technically wrong, but it laid out in a boring way. too many straight lines and right angles.
[DOITSU]
More interesting than Italia/Nihon, but could've use a bit more spice and interesting patterns to liven it up
[HERO!]
00:24:477 (1,2) - It's a tiny gripe, but it looks ugly compared to the rest of the map here. Mind closing this gap?
Overall, There isn't much wrong. Everything is solid and works fine, but it's kinda bland. It is your first map, so I won't bother you about it, but maybe in your next map, you could experiment more with slider shapes and patterns you could put your beats in. An interesting layour can make a map so much more fun without adding any extra beats. It helps making mapping more fun too
That said, for your first map, it's nice, so good job 
Starred

- For timing, I got offset: 796. the BPM is fine though
- Your combobursts are too wide. the max size for combobursts are the size of the default one, which is 388x787, which yours are 500x500. Perhaps shrink them down so it fits right?
- I see what you were trying to do with the difficulty names, but for most people, especially those who don't get the reference, like me, they don't work well as diff names. Maybe you could put an Easy/Normal/Hard/Insane next to each name? (e.g. "Italia (Easy)", or "Nihon (Normal)"?
Layout is rather bland, lots of straight lines, but I couldn't see anything technically wrong.
[NIHON]
Same as Italia, nothing technically wrong, but it laid out in a boring way. too many straight lines and right angles.
[DOITSU]
More interesting than Italia/Nihon, but could've use a bit more spice and interesting patterns to liven it up
[HERO!]
00:24:477 (1,2) - It's a tiny gripe, but it looks ugly compared to the rest of the map here. Mind closing this gap?
Overall, There isn't much wrong. Everything is solid and works fine, but it's kinda bland. It is your first map, so I won't bother you about it, but maybe in your next map, you could experiment more with slider shapes and patterns you could put your beats in. An interesting layour can make a map so much more fun without adding any extra beats. It helps making mapping more fun too


Starred