LiveSplit: https://livesplit.org/

These splits include subsplits for City Sewers and Dungeon of Florennum. In order to display them properly, right-click on Livesplit, select "Edit Layout", click on the "+", then "List", then "Subsplits". Then, drag "Subsplits" to the spot right underneath "Splits". Afterwards, click on "Splits" and then click "-" so that only the subsplits are shown. Click "Ok" to exit the Layout Editor. You can now save the changes to your layout by right-clicking on LiveSplit and clicking on "Save Layout As". The reason for subsplits being included in this layout is that here on speedrun.com the Individual Level speedruns for City Sewers and Dungeon of Florennum end prior to when the next Individual level begins. The subsplits allow you to split once when the split would end based on the rules here on the leaderboards and then split again as soon as the next split would start.

This is how the splits will look like with the default layout: