Fenmouth Approach
You're the approach controller. Vector arrivals onto the ILS for runway 27, send departures out to their exit points, and keep every pair of aircraft 3 NM or 1,000 ft apart.
What's real in here
3 NM or 1,000 ft
Radar controllers in busy airspace keep aircraft at least 3 NM apart sideways or 1,000 ft apart vertically. ICAO allows 2.5 NM between aircraft on the same final approach within 10 NM of the runway, if the runway is cleared quickly and other conditions are met. The game does the same.
Downwind, base, intercept
Controllers fly arrivals parallel to the runway (downwind), turn them across it (base), then give one call: "turn left heading 240, cleared ILS approach runway 27". The pilots fly that heading and the autopilot turns onto the localiser. ICAO says that last heading should meet final at 45° or less; 30° is normal.
Level, below, then down
Aircraft should be level on the localiser for at least 2 NM before they meet the glidepath, which they join from below. Do both at 30° or less and you score a textbook approach.
Each type flies differently
An ATR 72 rotates at about 110 knots and climbs slowly; a 737 needs about 150. Jets spool up, accelerate hard and then less hard, climb at V2 plus 10 knots to 1,500 ft, then speed up. Turns are limited to 25° of bank. Figures are approximate.