You can input the following custom css into custom css tab in theme options to make the widget display images right and overcome the limitation –
.ngg-widget img {
display: inline-block;
}
or if that has issues, try
.ngg-widget img {
float: left;
}
You will need to increase the space allocated to the the widget by choosing the right number of columns in Footer tab. Regarding this option, just play around with different options until you find something that suits your requirement. It is quite flexible but probably can be more visual to help understand better the layout.