Mole did not like cleaning because he said 'bother' which means he did not enjoy cleaning.
His back and arms hurt from painting and cleaning.
Because moles dig and live in burrows.
When it said the little tunnel going up it means he was under the ground. And he was scratching and scraping the dirt so he was digging up.
It was daytime because the sun is shining brightly and the grass is warm.
Mole was going to have a nice run in the sun.