How to use
+ Task adds a block. Drag a block to move it.
Drag from the blue ● handle on a block's right edge onto another block to create a dependency (finish→start).
Click a block or a link to select it; press Delete to remove.
Dates & sequencing are computed from durations + links using a Mon–Fri working calendar.
Export
Export writes MS Project XML (MSPDI). Open it in Microsoft Project via File → Open. Native .mpp is a closed binary format with no open writer — .xml is the supported interchange and carries tasks, durations, dependencies and dates.