Kattobi! Takuhai Kun

Translated in English, the title would mean Fury! Delivery Boy. And this is what the game is all about - you're an errand boy, sent by grocery clerks, to collect and receive whatever they tell you and try not to get robbed along the way. The game is fully in Japanese, but I beat it thanks to a video walkthrough that was posted on nicovideos. Also the bomb button is the same as the interaction button so that's why it seems I drop bombs at random many times.