Congrats on releasing your first game! I liked the use of the theme for the gameplay loop and the art was cute. I do agree it was a bit repetitive once you had to grind (especially for speedrun mode, I feel that should come free from completion), but the controlled environment is nice for the speedrunning too.
On paper, speeding up movement to help you get through the dungeon faster was nice. However, even at speed 2 it started to feel a bit fast as to be hard to control for me. It is necessary to have the speed boost be high but maybe there might be a way to control the speed a bit more.
The hitbox on the attack felt a bit tight, a lot of attacks felt like they should have hit slimes but didn’t.
I think the sound effects were nice but I think collecting a pebble also should have had one, feels like it’s noticeably missing with everything else having a collection sound.
Good work overall!